First of all, check your bow is aligned and that the arrow and button are set up properly.
Dial the button tension to a medium setting which gives a decent group size.
Adjust the nocking point to get the bare shaft landing at the same height as the fletched.
Then, assuming you're right handed and you have a riser with adjustable pockets, put a small turn on each limb bolt to increase the draw weight. Remember to adjust each bolt identically. Shoot a few ends, take note of the position of the bare shaft, and adjust again if necessary.
If you're left handed, bare shaft left indicates a weak shaft. If you have the adjustment room, turn the weight down. Otherwise you may have to look at getting the arrows trimmed down a little (if you can).
This sort of thing is covered in various tuning guides on the net, such as the Archers' Reference and Tuning for Tens. Google is your friend
