I had this problem and recently re-read a beginning instructional book on my shelf authored by Jay Kidwell.
I don't have the book in front of me so this is not verbatim, but....
Jay says "the good thing about learning to shoot consistently with regard to windage is that you only have to learn this technique once."
He recommends pointing your fist (bow in hand of course) at the target and shooting, paying close attention to what part of the hand, edge of the bow, etc., lines up with the spot you are staring at (trying to hit.)
Once you have that alignment (for that particular bow) just keep it.
Pay no attention to where the arrow is pointing, just hold that alignment the same each time.
Works for me.
Of course each bow is different, so if you are shooting a lot of different bows like I do, you are having to learn a new alignment mark for each bow.
Pointing the fist at the target is an obvious starting point which will need refining.
Each bow could be different depending on a lot of variables including the amount of center cut that each bow has.
Jay says he practices by trying to hit 2" saplings in the woods.
I'm not an expert.
Hope this helps.