Your driver's license photo has to be updated periodically as you age to accurately represent your appearance. How often you have to update your driver's license photo differs for each state, as does whether or not you are allowed to smile in your photo. For the best results, plan ahead. If you are renewing in person, it's a good idea to assume you may have your photo taken and dress accordingly. Here are seven great tips for taking an excellent driver's license photo to help you take a photo you'll love for the next several years.