The website Philanthropedia maintains a list of national and local non-profit groups organized by cause. Also, Matching Donations is a great resource for finding people who have offered to match donations to certain organizations.
Below are the tips and links included in the Read, Act extension. We've made this page public to support anyone who wants access to resources and guides for getting involved.
Write To Congress is useful for finding the names and addresses of your local, state, and federal representatives. It also provides an easy interface with prepared letters on a wide range of current issues.
If you are aware of relevant tools or organizations that are not listed above, feel free to reach out to contact [at] readact.us with suggestions.
jordandworkin [at] gmail.com