It really depends on how much effort and risk you want to take. Much of the advice you will receive on HN comes from Bogle and his Vanguard index funds. That is

It really depends on how much effort and risk you want to take. Much of the advice you will receive on HN comes from Bogle and his Vanguard index funds. That is the lowest effort and risk you can take. But, if you want to invest some more time and take additional risk (and maybe better returns) try reading some books. Peter Lynch's - One Up on Wall Street and Benjamin Graham's - The intelligent Investor are two good ones to start with. These will give you a solid platform on stock selection.