Anti-epiphanies are underrated. Moments when you thought you understood something but realize you don't. Confusion isn't celebrated, but maybe it should be. "Huh?" often leads to progress. What things did you feel you "understood" before, but now you aren't too sure?
What qualifies as leisure? How does one relax? I notice that I spend much of my spare time in a sort of haze, semi-focused on something, not truly recharging.