just wait around patiently...the market is tanking....some stocks will be cheap soon...you'd probably want to load up on some high-quality, blue-chip names, meaning big companies who have strong brand names and have been around for a while. (names like GE, Pfizer, Coke, Exxon, Proctor and Gamble, Bank of America come to mind) . try to diversify,,meaning have money spread throughout different industries in order to minimize risk.
or you could go a different route and buy a few mutual funds....try Vanguard or Fidelity to minimize fees and costs. look for no-load funds, meaning you dont pay a fee when you put in money or take out money. say you have $20,000 to invest. a good strategy would be to put $5000 into a domestic large cap blue chip fund, $5000 into a foreign fund, $5000 into an aggressive growth fund, and $5000 into a small-cap value fund. look at the Morningstar ratings..they say a lot about the quality of the fund's management. but remember, positive past results are not necessarily indicative of positive future results when considering these ratings.