I encourage you to take these two bits of information, synthesize them and apply them.
First, author Robert Heinlein:
If you are part of a society that votes, then do so. There may be no candidates and no measures you want to vote for . . but there are certain to be ones you want to vote against. By this rule you will rarely go wrong. If this is too blind for your taste, consult some well-meaning fool (there is always one around) and ask his advice. Then vote the other way. This enables you to be a good citizen (if such is your wish) without spending the enormous amount of time on it that truly intelligent exercise of franchise requires.
Second, The New York Times:
Senator John McCain of Arizona is the only Republican who promises to end the George Bush style of governing from and on behalf of a small, angry fringe. With a record of working across the aisle to develop sound bipartisan legislation, he would offer a choice to a broader range of Americans than the rest of the Republican field.