I was doing so well

and now I'm doing so bad

. So I'm almost afraid to play. I think: I just thought I knew what I was doing but really it was all luck. I should just study for a month or two and play nothing but freerolls; or I should not even think about poker for a month and come back with a refreshed brain; or I should take up online Scrabble instead. I just got that slumping state of mind. What to do, what to do?