"Tell everyone what you want to do and someone will want to help you do it." — W. Clement Stone
One thing we need to explain to people, somehow, is that "activist" does not mean "militant." You don't have to be right out front, leading the march. You don't have to be the one in the park burning some symbolic item. A person can, quite effectively, be what I call a "passive activist."
If you correct people who make stupid jokes about crossdressers or point out that not all crossdressers are drag queens, you are a passive activist. Just getting out "in drag" is activism of sorts; people will see you and know that you are not a monster; you've made an impression on them. The more they see us in a positive (or at least non-negative) light, the less likely they are to fight us.
The more store owners see us with our money, they more willing they are to serve us. The more often restaurants see us (and our money) and know that we aren't there to create a scene, the more willing they are to have us, even at the expense of less reliable customers.