-never aim down the sight
-aim a little opposite than where you want to shoot
say you want to curve up, aim a hair down
-jump and shoot, makes rocket curve down a bit so it goes stright
-it locks on to vehicles slightly, aim to where it's going, not where it is
RPG doesn't take much skill to use and it's hard to explain the ways to control the rocket, but a tendincy is it curves up, so aiming lower and jumping is the best two tips, that and Savanger Pro and Danger Close Pro.