One way to save a few extra dollars is to cut your own hair. Thankfully I have boys so buzz cuts are always an option!
Otherwise check around for coupons. If you aren't picky about where you cut your hair you can usually find a coupon to some place. I have found coupons on the back of grocery receipts, in the phone book, and in the newspaper. Most of the coupons are good for $2-$3 off a haircut.