You can save a lot of money by trimming your own bangs at home. First, make sure you have the proper scissors. Spend the money for a small pair of good haircutting scissors. Trim your bangs dry. How to trim them will depend on your hair type, but most people do best by dividing the bangs into three sections, holding the hair up in a twist, and taking small diagonal snips so that the cuts aren't straight. Drop the twist, see how you look, and repeat until it's short enough for your liking.