Sales. One component of your profit margin is your sales. Generally, the more coffee you sell, the higher your profit. There are a couple of things you can do to make sure your sales are as high as they can be. First, serve quality products. Second, hire a friendly staff.
Here, Annette Bening is in nerd glasses, those thick black frames that have become increasingly popular over the past 4 years (or so). You can see how her look is instantly transformed from the previous picture, just because of a change in frames. 3 of 19 Show All.
Take this pair on Annette Bening. These are the sort of glasses you want if you don't want to bring attention to the fact that you're wearing glasses. These frameless glasses blend into the face beautifully. A thin frame works well, too. Check out my gallery of eyeglass frames that aren't black for more inspiration.