I have voted in every General Election since the 1960s, in fact I've just returned from voting this morning. In all that time, not once have I chosen the winning candidate! My vote has not contributed to anything, but I'll still carry on voting, and hope that, eventually, this country will wake up and give us proportional representation. Everyone knows this is the fairest way, but who in government will support it?
I certainly agree with everything jim360 says on the subject.