A couple more things.....
Thinking it over, I realize I use swing through on quartering birds, sustained lead or pull away on crossers. Know how each works for you and when to switch. That will take experience, of course.
Do not move until it's time to mount and shoot. Camo is a little better than earth tone clothing but the best camo in the world is betrayed by movement.
I've used chokes from None to You've Got To Be Kidding. Best seems to be IC, LM or Mod. Take some tubes along, but remember chokes give you inches while misses are usually by feet.
HTH....