I actually used to do what daytimedrama is talking about, and now I’m more inclined to pick to my fences as Kachoo described. What she said is EXACTLY what my trainer says!! 
Balance through the corner, and come FORWARD to the jump!
But for daytime drama - my trainer would always say to add one more stride from what I wanted to do when I always went for the long distance. And make sure you get the add done far enough back so that you aren’t getting terribly deep. Also jumping with cantering poles on both sides of the jump is good for both problems - you just have to get yourself to the pole and the jump will work itself out. You’ll soon get used to the feel you have to have to get a nice spot to the jumps.
