I don't have much to back this up, but I get the general feeling that I am only going to invest in index funds for the equity portion of my investments. I feel if I do:
Vanguard Total Stock Market
Vanguard Total International Stock Market
S&P 500 index (through my 401(k))
I should be all set on that front. I am just starting out, and I plan to read some more stuff from John Bogle, because I feel as though I agree with a lot of his thinking, but those offerings are dang diversified AND don't have the potential fees, costs, risks associated with actively managed funds, etfs, common stocks, etc.
Eventually, once I have established my base, I will want to add other types of investments: Real Estate, Bonds, once I get older, etc. But in terms of playing the stock market, I think those will do me. Anyone think I'm crazy? Speak up and save my naive self. Thanks folks.