1. If you are walking you should be looking down to be sure not to step on sticks or anything else that might make noise. Only look in the trees when you are standing or sitting still.
2. Quieter guns = less spooked squirrels. .22 short or .22 LR subsonic is best.
3. The more camo the better. On private land I am head to toe camo, public land I'll wear a blaze orange hat.
4. When you see a hawk or eagle while hunting, just move on to the next spot. The squirrels won't be coming out for quite a while.
5. Going out after a light rain is best. Wet leaves don't make a sound.