Exercises for Boosting Zest
Improve your sleep hygiene by establishing regular sleep time, eating 3-4 hours before sleeping, avoiding doing any work in the bed, not taking caffeine late in the evening, etc. Notice changes in your energy level.
Do a physically rigorous activity (bike riding, running, sports singing, playing) that you always wanted to do but have not done yet.
Call old friend and reminisce good old times.