My girlfriend and I sometimes perform these food experiments. For one month, we do or eat something differently just to see what happens. For instance, we were vegetarians for one month. This month of January, we're cutting all sweets and desserts out of our diet.
I guess these are more like body experiments. The point is just to see what happens when we change our diet. You can call it "exploratory eating". Do we feel more energized? Healthier? More tired? Is there no change?
The point I'm trying to make is that the testing mindset can (and should) be applied outside of software. Applying your skills in testing on your finances, health, and mental well-being could be a interesting (and possibly rewarding) experience.