Another tried-and-true method for promoting your show is to make sure your show’s information appears on local listservs, blogs, and event calendars as soon as the information is confirmed. Don’t sleep on these websites and print publications. They often post about a show weeks before the event, and local editors and writers check them out for potential editorial coverage. You can usually search for event listings and add your info yourself to their websites.
Here’s an obvious one. The clothes you wear when you’re on stage are a costume and you should think of them as such. Even just wearing your everyday street clothes is going to communicate something to the audience. It sounds annoying and unfortunate, but I guarantee that you do it too when you see a concert: judge a band based on their rags.