This is a good start. It's from the Easton Tuning Guide.

If your broadheads are hitting high and left, you need to raise your nocking point and move your rest toward the bow in small increments (1/32" at a time). Raise the nocking point first until BH's and FP's hit on the same elevation. Then move the rest toward the bow to fix the left/right problem.

If the above doesn't work, you have an arrow spine problem. That can be fixed by new arrows, changing Draw weight, oradjusting tip weight.