You've got two ways to go when hunting flying birds. Go for the meat and use a gun or go for the fun and use your bow. If you chose the bow then you just need to go for it. Don't try too hard, just relax and go for it... negative thoughts have no place in the wing shooting game.
I've shot, ducks, quail, pheasant, chukar and I can tell you it's no time for form work. Just focus and shoot. You just might surprise yourself.
If at all possible forget flu flu's. In my opinion they are a handicap.