Lets see, where to start.
Tiller tuning, tuning the bows tiller to the way you grip and shoot the bow to your style so that both limbs move forward at the excact same time: IE level nock travel for your shooting style.
Start by making sure that the cams are in time { single or dual }
Take all nock,kisser,peep measurements,write them down.
Get nine { 9 } paper pie plates
mark one EVEN TILLER
mark next ones {4} top limb 1/4,1/2,3/4,1 turn
mark next ones {4} bottom limb, 1/4,1/4,3/4,1 turn
warm up at about 30 meters{ yards }
first plate even tiller shoot six arrows as best you can, no hurry
next plate { top limb 1/4 turn } back off top limb 1/4 turn reset nock,kisser,peep,shoot six arrows.
next plate top limb, 1/2 turn, turn off top limb another 1/4 turn so it's now at 1/2 turn off, shoot six arrows
do this for the rest of the top limb, 3/4, 1, shooting six arrows at each plate till top limb is 1 full turn off.
now put those plates aside, set bow back to even tiller
start on the bottom limb and do it all over again 1/4,1/2,3/4,1
remember to reset the nock,kisser,and peep each time you take off a 1/4 of a turn, it woun't be much but it will make a difference.
When all nine plates have been shot lay them out and see which tiller setting has the best group and set your bow to that.
your bow is tiller tuned to the way you grip, stand, anchor, TO YOU
with a little micro tunning on your rest you should see your groups improve.
It's a long process, so take your time, it's an all day thing, you can even do it over a couple of days, half one day the other half the next day.
I'm not very good at typing this out so I hope you understand what I'm getting at.