I agree here. You have to be able to judge the distance and make a shot. 3D shoots are good practice. If you go the portable target route (cube, box, etc), my suggestion is to not put a dot to aim at. Try to center the arrow in a 12" square. Deer don't have dots usually to aim at! And it makes you focus on the shot. Once you do all this on the ground, climb up a tree and shoot from a stand at your normal heigth. Then, aim at a dot to determine arrow placement vs practicing on the ground. Bend at the waist when shooting.....