Cyrus, I've never done more than my 401(k) which never had a big balance. I completely cashed that out, though. I'm not a fan of doing any kind of trading in this environment and in this market. I think you have better odds at the Black Jack tables in Vegas.
I don't know of any particular site for tips or strategy, but I've always been impressed with the reason and the legwork done by Karl Denninger on The Market Ticker:
www.market-ticker.org He does have an investor's forum where he provides info and people discuss trades and strategies and that sort of thing, but I think its a subscription side to his site. I just read the Ticker itself, and its more commentary and blogish. If you are looking for somewhere to start, though, it may be worth looking in to.