i recommend to start with a matched set of arrows for range practicing.
of course you'd have to find what set you need. through trial and error.
go through your current set (i'm assuming they are primitive arrows) and number them sequentially with a piece of masking tape on each one.
go and shoot a few rounds at your target from the same distance, preferably within 10 yards because it's less distance for the arrow to correct its flight.
really focus on your grip, your form and your release. take note note of which arrows get the closest to the bullseye. it may help to write down the results. also, take note of which arrows that penetrate the target at any left/right angle other than dead-on. you'll want to remove those arrows from the quiver unless you have the additional materials to change the weight of the field points. (you'll come back to these for tuning at a later date, so note on the paper which angle they penetrated). if they are penetrating at an up/down angle, you can adjust your knocking point accordingly on your bow string to compensate for that.
you may find that only one or two arrows really make the grade. take those good arrows and shoot a couple more rounds with them. you may then again find that one shoots better than the other.
weigh, measure, spine test that arrow so that you have a record of what shoots best out of that bow. now you can attempt to make that same arrow based on your results. or you can purchase a set of arrows with those specifications and target practice with them to tune your abilities with that bow.
when you have arrows that are matched (or semi-matched) to your bow you can start to compensate for the grip/form/release/aiming errors and really start building your muscle memory for instinctive shooting.
there are a lot of other variables that you can employ, however, these are some quick things that you can easily try without cutting or re-fletching your arrows; and you will end up with valuable results from your testing.