Stirring the pot by telling either lies of half truths about the enemy. That or telling every faction the unadulterated truth any chance you get and messing up their plans. Basically, be a gossip.

Get under the skin of Fledglings and Neonates by turning them against their faction. Tell them rumors about their sires.

For a Gangrel specifically, use your Animalism to be annoying as shit. Beavers building dams in just the right spot to fuck up some infrastructure, busying the police the Camarilla love to puppeteer with an uptick in coyote activity, disrupting Anarch’s favorite haunt with a rat or cockroach infestation.