Something I know that I have the ability to do is signal boost, so here are some of the writings, actions and movements that have meant something to me that I want to bring to my readers. It's important to keep reading and staying engaged in things, even when we feel powerless. There are still things to do.
It's important to confront racism when you read it (on facebook) or hear it (at work/in your family/etc). As white allies, it is important to not just say we're allies but do the work.