A great way to invest systematically in individual stocks is to start a Dividend Reinvestment Program-also known as DRIPs. DRIP plans allow investors to purchase stocks directly from the companies that issue them. Once an account is set up, investors can continue to buy more stock systematically and have any stock dividends they earn reinvested automatically, often with no commission costs.
Setting up a DRIP account is relatively easy. You first need to become a shareholder (by owning at least one share of stock). These sites can give you more information about DRIP accounts and setting one up.
The Motley Fool
The DRIP Investing Resource Center
About.com - Dividends and DRIPS