check out
valuegrowth investing , should be a great introduction. Goes through the processes of the most successful investors - buffet, neff, lynch, etc. and then synthesizes them in an approach. The synthesis is not all that useful in my opinion but the main thing is to see the commonalities in the different approaches to help start seeing what makes companies worth investing in.
This is kind of off topic, but I've heard from a lot of investors I respect that if one is not going to put a LOT of time into learning how to invest, its probably best to just spread money across weighted indices that mimic the behavior of the S&P (or whatever) or a sector that one thinks is promising. Any seasoned investors want to comment on this?