Any good Triple jump and High Jump drills or techniques?

hey, im going to state for triple and high jump, and i want to train for preperation. does any1 have any good drills that i can do during training, or some techniques to it? (im 15 yrs old, so i know the basics or each event :P, like in high jump, to curve ur runup then arch ur back in the air, and flick ur legs over, and in triple jump, to try and extend your step)|||jump with some 10 or 20 lbs weights and practice jumping at the same height and lenght