My diary entries allow me to keep track of all the things I would like to change about my life.
I myself am doing a full year of experiments every seven years, but I'm sure many other divisions are possible, depending on the field, the possibilities, and personal preferences. One hour a day or a day a week.
Having guts always works out for me.
Drugs feel great in the beginning and become a drag later on.
Hobbies are for people that don't like what they're doing.
You can have an art experience in front of a Rembrandt... or in front of a piece of graphic design.