Tipping can be a little confusing if you're not versed on the basics. How often should you tip, and when is it appropriate? As a general rule, service industry professionals rely on tips to supplement their income. The most commonly tipped employees work in restaurants and in salons – but don't forget about those hotel bellhops and cab drivers while you're traveling! With these savvy tips from our friends at Coinage, you can be prepared before you get the bill – and won't ever feel like you've gypped someone out of their fair share.