A nice trans activism thing I like to do is, whenever I see an article about a school or a library or something being trans-inclusive or supportive of trans people/issues in my country, I send them a thank you card/note in the post.
They're probably getting hate mail about it from bigots, you know? Maybe a librarian/admin person getting something like that could make a big difference, now and also further down the line.
@cassolotl - When I see Girl Scouts selling cookies and they ask me if I'd like any, I always tell them I can't because I'm diabetic, but ALWAYS give them a $20 and tell them this is because the Girl Scouts are trans-inclusive. :)