Consume (enjoy, purchase) art, in all forms, produced by non-white people. Could include attending performances, choosing specific movies and documentaries, etc. (See Self-Education above).
Create visual art, poetry, films, websites, social media campaigns, etc., that address what you see as the role for white people in struggles for racial justice.
Have tech and design skills? Help folks under siege keep their websites up and running, design accessible communications, design useful apps, and keep their stuff secure. (Source).
Organize and fund opportunities for people from directly impacted communities to share and be compensated for their art.