Link to anti-Trump groups / websites on social media.
Repost or like anti-Trump content in social media – but only where it encourages taking actual action. (Auntie Punt says: we’ve all done enough complaining-for-the-sake-of-complaining…)
In comments on other websites, discuss and link to anti-Trump sites.
Write anti-Trump letters to the editor etc.
Encourage online newspapers or other media to take an anti-Trump stance, or a more forceful one.
Stuff to do in real life
Know people in swing states? Check out the “Stuff for people in swing states” menu item too.
Don’t have time to volunteer or $$$ to donate right now? Maybe encourage friends to do so.
Don’t have time to volunteer or $$$ to donate right now? Maybe try to set aside some time or moolah so you can later.
Encourage friends or family to pool money to donate.
Got a birthday coming up? Maybe ask people to donate to a group instead of giving a present.