Libertarian author L. Neil Smith has some of the best quotes I've ever read. From anyone. Including Spooner, Jefferson, Paine, Locke, or even Plato.
If you're not a little bit uncomfortable with your position, it isn't radical enough. How can you be too principled? Take the most extreme position you can -- you're claiming territory you won't have to fight for later, mostly against your "allies".
Know when to give up a lost cause. Anyone who needs to be persuaded to be free, doesn't deserve to be.
Every man, woman, and responsible child has an unalienable individual, civil, Constitutional, and human right to obtain, own, and carry, openly or concealed, any weapon -- rifle, shotgun, handgun, machinegun, anything -- any time, any place, without asking anyone's permission.