If you refer to peaceful methods, then look no further than Ghandi and MLK. Protest peacefully. Make them raise their fist. And record it, tell the stories, reduce their mandate.
If you come from Malcolm X's or IRA's point of view: assassinations, military-like strikes, and generally war.
Then of course there's Nelson Mandela. He started with peaceful means, came to the conclusion it was ineffective in his case and turned to violence. Later he refused opportunities to leave prison that would have required him to renounce violence. Ultimately, he didn't need to fire a shot after he was released but he would have done so with a clear conscience. Non-violence can be a moral choice, but so can violence in the face of great, violent injustice.
Of course, we're assuming asymmetric warfare here. No-one honestly believes FDR was wrong to declare war on Japan.
It depends. Do you regard your enemy as a good person doing a bad thing, or as a bad person doing a bad thing? If it's the former then teach them a better way a la MLK and Gandhi. If it's the latter, then teach them a better way a la Malcom X.
If you can see some compassion or love in your enemy's eyes, then every time they hold up their fist to beat you you should hold up a mirror.
