i've been riding with a guy lately who seems to know everything about the sport. i had been struggling with the backroll for a year and he told me to isolate that one trick and just keep going for it. i hit it that day. so that would be my advise for you. just go for it over and over till you get it then hit it 5 times and move to another trick
it works differently for everyone. i like to keep 3 or 4 things i'm working on always. i have to really be feeling something in order to try it. so if i'm not feelin one thing one day i'll go to the next and so forth. keeps me progressing.
I have 2or3 tricks ill be trying and after i land everything that i have down i goto those and if im feeling really close on one i just keep trying that till i land it or i'm done with my set. Pretty much what jr is saying.