I am with Isha also. The biggest things to me are to take your style and adapt it for the event or people you will be around. Notice I didn't say dress like the others. There is still individuality. But don't be dressed for a formal and shopping at a strip mall. Unless of course you want to, but that is a different subject. People sometimes scoff confidence, but here is what I found works for me. Don't skulk about. We always notice those sneaking around the edges. Look up at everyone and make eye contact. When you are looking down, people are then allowed to scan you up and down. If you look at everyone in the eye, then they lock eyes and then look away. A bit of the alpha dog effect. But you aren't trying to scare them, so smile to and what you get is a friendly reaction at least most of the time. You belong, you accept that you belong, it helps others accept it.
Does this work 100%. Hell no. There are thousands of things to consider. But if you go in and look like you are going to rob the place, you will get negative attention.