Penny stock strategies are a lot like those employed by traders of other securities. There are many methods, many different approaches, but in the end, buying low and selling high is the basic concept. Some of the more popular strategies include:

"Reporting Time" Investing - Investing around the time of annual or semi-annual reports, when good news is expected. This is risky, and basically gambling.

Swing Trading - Studying charts and determining when a stock will swing, then finding an IN-Point and excuting a pre-determined EXIT-Point.

Bottom Picking - Finding stocks near their 52-week lows and investing in a possible comeback.

Other strategy guides:

AmericanBulls.com - The AmericanBulls.com computer calculates when to buy and sell securities. It tracks it's progress as it goes, and is quite successful. Only problem is, that it may not be that easy to actually get the shares at that price.