First in the wake of the assault on Minnesota.
Synct in cities across America. Plan to be at one near you. If you can't be there, do something significant. Write an actual letter and snailmail it to your Congressman or Senator, or if that is a Republican, to his or her opponent. Your time and good thinking are more important than just giving money.

This is gearing up to be the biggest protest in US history and will fuel momentum into summer and the midterm election in November. More protests will occur between this one and the election. They're all important.