Hi tethersend
Drowning kittens will not be popular, unlike pretty much all the suggestions above.
Thanks to the public's utter lack of faith in the economic competence of Ed Balls, and in Red Ed's leadership capabilities in any way, shape or form, whatsoever, the fundamental arguments are all in the Tories' favour. They have made the right strategic start in their first two years (though they have been far too timid in so many ways); they now need to cement this excellent start by creating new conservative voters.
One of the very best ways is to open new Free Schools and Academies. Everyone who chooses such a school will know that the Labour party (now that the Blairites are dead, and despite Steven Twigg's best assurances to the contrary) detests the idea of parents having full choice in their children's education. That means they have a very strong incentive to vote Tory. Free schools have the potential to become the "buy your council house" policy of this generation.
Michael Gove has been, by far and away, the most impressive of the Tory Cabinet, apart from Osborne, perhaps. Iain Duncan Smith will have his chance to claim this mantle over the next few years as the reform of the bloated welfare state begins to kick in though.
The Tories need to find far more "hooks" like the Gove free schools. If you can make floating voters into sticky voters, then you can win elections.