Contact your government representatives to support a cause near and dear to you. Check out 5calls (in the US) to locate your local representatives and find helpful scripts for a variety of causes. If you’re not in the US and have a useful local resource for connecting with elected officials, feel free to reach out and let us know!
Volunteer to assist with a hotline. Not all require a big commitment. See here for some ideas.
Some small steps you can do right here in your browser are to enroll in Tab for a Cause, which raises money for charities every time you open a new tab on your web browser, and use Amazon Smile if you shop at Amazon.
Spread joy with information, graphic design, meme creation, creative writing, etc. In previous years, we organized a letter writing campaign to kids in Alaskan schools.