Select a write-in for every office, and use it to demand
Range Voting rather than selecting one candidate.
If we can finally make the move to range voting, then there is no such thing as a wasted vote. You don't pick the lesser evil, you state just how good or evil you think each candidate to be. Ranking one highly would provide no benefit to those you like less than your more popular second choice.
Mock elections have shown that if the parties, candidates, and campaign strategies did not change, then the Democratic party would almost always have a small majority, balanced by a significant minority of Libertarians. The green party would be the third strongest party, followed by the Constitution Party, with the Republicans coming in 5th and rarely even winning one seat in congress.
Of course, this is mostly because the demography and divisive tactics favored by so many recent republicans is suicidal in range voting. With range voting it is more important not to be hated by a large segment of society as to be loved by a slightly larger segment. Playing only to your base is not really an option, especially if it is done through fear-mongering and demonizing the opposition. This system would facilitate a much more civil dialogue. It has been shown to have a nursery effect leading to the growth of small parties, without giving power to radical fringe parties.
I would of course also insist that range voting be used for choosing leaders within legislatures, rather than basing power on seniority and partisan affiliation.
