You only waste your vote when you vote for what you don't believe in. If everyone who supports our principles would unite behind a genuinely conservative party, we'd have a good chance of electing candidates who share our views. Instead, we are expected to support Arlen the Specter, those two ladies from Maine, Lincoln Chafee, and other such liberals to advance a party that betrays us at every opportunity.
And to make it worse, as Stan Evans points out, "Whenever one of our people gets in a position to help us, he ceases to be one of our people."
There is no reason this can't be done WITHIN the GOP.