My biggest one is learning to influence my horse with my seat. Some days it's awesome, and we click so well, and other days I can't seem to get it right. The other is starting to use my core more when riding. I'd also like to learn to finesse my cues, and cue exactly when I need to, not before or after. Basically I just need to tighten up loose ends. The basics are there, now it's nitpicking time.
I guess right now I need to keep working on myself, finding out how what I do influences how my horse is going, etc.
I give myself very good advice, But I very seldom follow it