Some ideas in addition to donating:
This site is new, but is attempting to be a growing resource on action items, organizing, etc. https://www.whatdoidoabouttrump.com
If you live in a state that hasn’t yet signed on to the National Popular Vote by Interstate Compact, contact your state reps and urge them to do so! This may be the best shot at effectively abolishing the electoral college: http://www.nationalpopularvote.com/ (makes it super easy to find out where your state is on the issue and to contact your reps).
I’m super introverted, and this piece was helpful for getting me to call reps: http://actionfriday.tumblr.com/post/153358069831/shy-persons-guide-to-calling-representatives
Finally, Nicole, I’d like to suggest “Number the Stars” as a next possible part of your series. Right now I’ve been thinking a lot about books, both for children and adults, about moral courage and dissent in ages of authoritarianism.