Ahhh advertising, one of my favorite subjects in business. There are some pretty good ways. You can make a sign about your daily special or something about one of your Products. Use balloons! It is the most easiest, common, and i think it's one of the best ways to grab peoples attention. Therefore, attach the balloons to your sign and put in front of your coffee shop. That's a very easy way. Hmmm, storefront... You can hang something such as a banner that can say something of your choice. Like about a sale or special, just like you would with the sign and balloons. Another idea you can do is make your own commercial. It doesn't have to be on the t.v. maybe like a radio station commerical. That costs thousands of dollars though so your better off the sign and balloons and banner for now.
I'm a business kinda guy