I'll have to get one of those crochet hook/needle things, sounds like a great idea!
I always have to have paper and pencil to keep track of my knitting, row counters just don't work for me, I forget about them. I find it harder to ignore the big blue clipboard that has all my current patterns attached to it!
Two of the best tricks I've learned are tinking and inserting a needle into a destination row. Both of which I learned from this article
I find it tricky inserting a knitting needle into a destination row so I tend to use a piece of thread or something but the idea is the same.