After making up a set, I recheck spines and weights and micro-sort them. The best and most consistent get the broadheads, and if I notice one that seems better than the rest when I shoot them, it gets the #1 position. At the same time, I make sure the rest of the quiver shoots the same. It's purely mental.
I restraighten them before each practice session as needed. After a few straightenings, any shaft worthy of hunting should stay straight. Shooting them will weed out any that are hopeless. That should be rare, if you matched them well to start.
The best thing you can do for the stability of wood shafts is shoot them. The flexing stress-relieves them, and any shaft that's unstable due to stress in the wood will settle down when it's been shot enough.
My hunting arrows always have some red on them, for juju. Ishi did it.