If you have one through your work, start there. Most companies usually will match a percentage. Find out how much they match and contribute up to that amount.
Then if you can afford extra, put that into a Roth IRA.
I recommend getting a financial advisor (though some place like Edward Jones). We have one and he is extremely helpful for understanding how to allocate our investments, how much to invest, what the different investments means, etc. They don't charge you for financial advice, only if you open up an account through them and then there's an annual fee (only about $40). For us it's worth it.
at 9:36 AM on Dec. 29, 2010