Literally just go outside and write ACAB on something. Dumpster dive something. Slack off at work. Map your neighborhood's security cameras. Delete your Instagram. Write a political prisoner. Start a garden. Drop acid. Give a homeless lady some hand-warmers. Put "out of service" signs on parking meters. Pick one and do it right now.

These aren't revolutionary acts, these are the calisthenics you do so you'll be in shape for the revolution.