I have a horrible time remembering how many reps I did or how much weight I lifted from week to week, and I think it holds me back! I'll start with weights that are too light or start my reps too slow because I can't remember and don't have the confidence to push myself harder or heavier!
When I have numbers in front of me, I can say, "I know that I am stronger this week! I can go a little heavier! I can do one more rep!" I don't track everything because it slows me down, but I do track the reps for exercises when I can compete against myself (e.g., skater jumps, burpees!), the weights I use, and the modifications I make (e.g., half of set on knees).
I hope you find this helpful!
(PS: I didn't make these for pilates or yoga because it didn't really seem to apply.)