Here's a trick my dad taught me: hold your hands in front of you at arms length with your palms facing away from you and fingers pointing up, cross one hand over the other until you have a small triangle of open space made up by the webs of your thumbs (about 1 inch wide), now pick a spot on the wall thats not very far away and look through the triangle at that spot, now close one eye and then the other, whichever eye has the spot centered in the triangle is your dominant eye.
Not very scientific, but it works unless you think too much about what you are doing. Here's something to confuse you,
my left eye is dominant, Im left handed, I shoot and throw right handed, my right foot is dominant, and I use kitchen utensils right handed. Talk about messed up...but besides all that I'm still a good shot, go figure.
