I'm a firm Jack Bogle investor. Time IN the market, not timing the market.
I set up little IPS statements. Right now, it's "Pay son's tuition and all credit card payments. When bank account accumulates $10k, put $5k into SCHB".
Market timing would be: "Wait for global commodity future comingled arbitrage data to point to a higher future gain acceleration factor, then invest $5k in SCHB"......or some other nonsense that makes one think that their "feeling" about where the market is moving should govern how or when they should invest. I stopped counting market highs last year when it got to 15 times for the Dow. If you don't want to invest at a market high, go open an Ally savings account because you'll never invest.