easiest trick. coming up to the jump get low and stacked. at the end of the lip pop lightly, lean your head back as far as you can, this will arch your back and control your rotation. Just keep looking back as far as you can the the rotation will keep coming around. COMMIT my first backflip I was scared and I fagged and I landed on my head. It's such an easy trick if you just commit to the rotation, remeber overrotating is better than underrotating.
Don't worry about the size of the jump I can throw a backflip off like a 2 foot high jump, youll get it around if you commit. If you know your going to fuck up, bail on your side it hurts less.
good luck