A quick tip for newbies (such as myself): Check your brace height!
When a bow is strung (braced), the distance (height) between the string and the innermost part of the bow is the “brace height”.
After some erratic (and frustrating) arrow flight, I measured the brace height of my bow and found it to be 3/4″ short of what it was when I first started shooting the bow. I twisted the string 5 1/2 turns tighter and the arrows once again fly where they should: where I look. It’s a subtle change, but it makes a huge difference in accuracy!
-BGM