I read Anne-Laure Le Cunff’s debut book, Tiny Experiments, just a month after it was released in March 2025. However, this was not my first sight of the key ideas that the book contains, because I was lucky enough to be chosen as one of 300 people participating in a series of four, weekly online workshops, led by Le Cunff, that took place in February, in the lead up to the book’s publication. These workshops and the online community that accompanied them was called The Curiosity Collective, the name giving prominence to what is perhaps the key theme running Le Cunff’s work – the exhortation to live life in ‘curious mode‘, always willing to explore and experiment with your approach to life, and how you operate in the world. My experience attending those online workshops, showed me that Le Cunff is a highly skilled communicator and excellent teacher, and so I approached reading Tiny Experiments with high expectations. As an added bonus, the book had been chosen as the April pick for The TimeCrafting Trust Book Club.
As noted above, curiosity lies at the heart of Le Cunff’s ideas, and this is most obviously seen in her simple, four-part model for exploring and implementing change in your life. This model is rather neatly captured by the word sequence: PACT > ACT > REACT > IMPACT. At the start of the book, Le Cunff encourages the reader to adopt the mindset of a ‘self-anthropologist’, observing how they act in the world and the outcomes of these results, and then asking questions in relation to these observations. Le Cunff then structures the bulk of the text around her four-step model, stressing the importance of moving away from a Linear Mindset (X leads to Y leads to Z – end of story) towards the adoption of an Experimental Mindset based on the implementation of continuous experimental loops. My own feeling is that the key message here is not really about the distinction between linear v looping but, rather, one of ongoing adaptation and experimentation. The experiments one conducts don’t need to be thought of as loops (in fact they probably won’t bring you back to near your starting point) but they should take you somewhere, and in the process provide valuable evidence to help you work out what you might experiment with and where you might go next.
In the PACT phase of her model, Le Cunff presents a really neat (because it is simple) template for setting up what she refers to as a Tiny Experiment (an exploration of what happens when you make some small, realistic and manageable shift in the way that you operate). This template – a PACT – takes the following form:
“I will [action] for [duration]”
The key here is make sure that the action is purposeful, actionable (something that you can reliably perform), continuous (i.e. repeatable and not changing from day-to-day) and trackable. It is also important to be specific about the duration of the experiment (or else the number of repetitions). This ensures that the experiment is set up so that it provides a large enough dataset for meaningful conclusions to be drawn, but does not continue for so long that the action becomes tedious, or redundant or of little continued value. Essentially, the whole point of the PACT is to provide information that can then be used to adapt future behaviour and experiments, and not as a means to try to establish new habits.
In the ACT phase, you set about completing the activity specified in the PACT. This section of the book has some interesting material exploring the powerful forces of procrastination and, associated with this, perfectionism, that can so easily derail progress towards a goal.
The third phase of the model, REACT, occurs once the action described in the PACT has been completed for the specified duration. At this point, the goal is to look for, and then consider, evidence of the results of the action. Le Cunff highlights that it is important to look for evidence from within/internally (reflection) and externally (feedback from others, evaluation of results). Here, she presents what I suspect will become the most significant legacy of Tiny Experiments, namely her simple PLUS- MINUS-NEXT framework for reflection: what went well, felt good – what challenges or obstacles you faced, what was difficult, what negative feelings emerged – and then how the insights gained can shape future actions. [But whilst this framework is neat and seems to be catching on in the productivity community it might be noted that it is not so very different from the well-established ‘plus-minus-interesting’ framework.]
Because the whole point of Tiny Experiments is to encourage the adoption of an Experimental Mindset towards life, the REACT reflection should lead to a decision being made in relation to the area being investigated by the PACT. Le Cunff suggests that there are three possibilities: PERSIST – prolong the pact, or PAUSE – quit the pact or put it on hold, or PIVOT – modify the pact or shift the focus of a subsequent pact.
The final section of Le Cunff’s framework, IMPACT, focuses on the idea that it is helpful to be open/public about what you are setting out to achieve with your PACT and/or to work with others when pursuing it. This is largely a matter of gaining a useful chunk of external accountability, and also valuable feedback, but having seen many ‘public’ statements of Tiny Experiments PACTs in Le Cunff’s online community Ness Labs and on social media more generally, it is clear that it also serves as a powerful tool to market and promote Le Cunff’s ideas.
I enjoyed reading Tiny Experiments, and I feel pretty sure that it will be the kind of book that continues to have presence in the market for some time. It is well written and nicely structured, and the core ideas are simple (which is a good thing) and neatly presented, such that they have every chance of ‘sticking’. I think the phrase ‘Tiny Experiments‘ will likely become part of the productivity lexicon in similar fashion to James Clear’s ‘Atomic Habits‘. I also think that the “I will [action] for [duration]” statement for a PACT, the ‘PACT-ACT-REACT-IMPACT‘ model (or at least the ‘PACT–ACT–REACT‘ part of it) and, in particular, the ‘PLUS-MINUS-NEXT‘ framework for reflection, will all end up having a healthy existence outside the printed pages of the Tiny Experiments book…
… but in the end, my enthusiasm for Tiny Experiments waned. I had several goes at defining pacts and conducting experiments, but I wasn’t able to make myself see any of them through to a satisfactory conclusion. Life got in the way, and I found myself ignoring my pacts and carrying on with my usual scattergun approach to trying things out. This, of course, probably says more about me than it does about the potential efficacy of Le Cunff’s ideas, but my experience was that despite the simplicity and neatness of the Tiny Experiments model, it did not possess enough power to persuade me to go all in with it. I have also felt that most of the Tiny Experiments that I have seen others setting out to pursue would really be much better described as ‘tiny habits’ (a phrase already coined by the author B.J. Fogg and, of course, rather similar to James Clear’s ‘atomic habits’), rather than tiny experiments, and to put it bluntly, many of them read like tiny morsels of misty-eyed, wishful thinking…
So, in the end I congratulate Anne-Laure Le Cunff for writing a really nice book that captures some neat ideas and makes some good general points, but despite the fact that I am still indulging in some daily ‘plus-minus-next’ reflection, I can’t say that it has turned me into a Tiny Experimentalist.
Tim O'Hare 