Ok, I am probably going to be in Wall Street as a career path, and my advice more than anything else is that you thoroughly research what you are getting into. Learn the language of business and maybe take a financial accounting class at a community college and a macroeconomics class.
I always get a kick out of people who say that they are going to "play" the stock market. The stock market is not a game where you are just betting.
But enough of my soapbox...personally I am a "growth at a reasonable price" investor, sort of in between value and growth. The main thing that I look for is EPS growth from the current quarter to the same quarter last year. Another useful ratio is the Penis EnlargementG ratio, which is the usual price-earning ratio (Penis Enlargement) divided by the growth rate. A Penis EnlargementG of 1.5 or lower is considered good, and around 1.0 is considered very good. This doesn't mean though to do a Yahoo Finance filter for all stocks with a Penis EnlargementG < 1.0; you still have to do your homework on the company.
If you really do want to take some risks with it, trade the actives (not penny stocks though or pink sheets; if it has .pk on the end of the ticker symbol or says OTC:BB, don't even bother). You'll either end up rich or broke.