As per Marc37's nutritoinally-oriented protocol, maintaining a healthy lifestyle and nutritional regimen can maximize one's chances of hair health, however, alas, genetics has an overpowering effect, ultimately. Rogaine is effective in a small % of cases, though it is worth a try. Any results can take several months. As Rogaine can be expensive, the most cost-effective approach would be Costco's own Kirkland house brand of Minoxidil. It's the same formulation as Rogaine and costs pennies per application. Exercise is important to increase circulation. Also, an herb called Saw Palmetto, which is used increasingly to counteract cases of enlarged prostates by lowering DHT in the bloodstream (DHT can trigger male pattern baldness) is finding its way into hairloss regimens. Saw Palmetto is essentially an herbal form of Propecia, however without the potential impotence side-effects. A nutritional regimen containing the full complement of anti-oxidants (B, C, E, Selenium, etc) would be advisable, too.