I hunt squirrels more than anything else. There are a couple of ways, depending on weather conditions and how early you get up.
First and most importantly, before the season starts do some scouting for squirrel nests in trees and other signs of squirrel activity, and locations of lots of squirrel food.
Then pick a nest and get there 20 minutes before sunrise and sit down (as quietly as possible). Then sit still. If you have to move (like scratching your nose) do so very slowly. Most often a squirrel will been seen on the tree within a half hour of sunrise.
Doesn't work every time, but I'd say in the last season it worked 2/3 rds of the time for me.
You can also use this method near sunset when the squirrels are returning, but for some reason I have less luck at that time.
Once the sun is up I usually still hunt wherever thier food is, walking 3 or 5 steps quietly and then standing still for a bit, maybe 2 minutes, and then step again. This is less likely to work when it is really dry because the leaves make too much noise when you step on them, but it can work then also, just not as well.
Or else you can go where thier food is, make yourself non-obvious, and wait. Remembering that squirrels can see in color ("dichromatic" color vision). You don't have to wear camo, but something tan, green, brown etc so you don't stand out (except for the required orange stuff, of course.)
Good luck! :thumbsup: