Massive insider buying. I have written several times about the lack of it.
Major corporate buybacks or dividends. For example, Apple could change the dynamics by splitting the stock 10 for 1 and pay a $25 billion dividend. It would have to be many more than Apple.
Step up in takeover activity. We need to see the prices validated with takeovers.
End of the gross excesses in the IPO market that values social media companies at absurd levels.
Some good policy moves by the Obama administration. For example free domestic energy exploration with tax incentives instead of threatening the end of tax breaks for oil and gas companies.