Why start with one experiment at a time?
Trying several new habits together makes it harder to tell which one you can sustain or which one mattered.
Choose one activity and keep it simple for seven days before changing direction.
Open my labWhat to notice
Write down major changes in routine that happened during the week.
Record a 1–10 daily rating and whether you tried the activity. A missed day is useful context; it does not erase the rest of your week. At the first checkpoint, you can continue for seven or fourteen days, or choose something else.
How to interpret your result
Even a single-action week has confounders. The aim is better self-understanding, not controlled laboratory proof.
Keep your original prediction separate from the daily ratings. Your starting rating, number of observations and changing circumstances all matter. A personal week can reveal a pattern worth exploring, but it cannot establish cause or statistical significance.
Evidence and context
This guide describes a small personal practice. For the wider research context, see Well-being-focused interventions: network meta-analysis of randomized trials. Research findings describe groups and study conditions; your lab records describe your own experience.