The most civilized method to influence policy has always been the act of voting.
[0]: I'm not saying they should be, since that's what political representatives are for.
I don't get this "voting every 4-6 years" story in most past of the world. This leads either to the political apathy or to the riots, like it is now in France and in Belgium.
We have to have a habit of voting in order to be efficient at it. For the same reason, my spam filters are relaxed and every day I read a few spam messages that slip though, to stay alert of what the spam is, and how it changes over time.