Dividing your money between an employer-sponsored retirement plan and a Roth IRA lets you deversify your savings between taxable and tax-free income.

Contributing to your company's retirement plan is a smart and safe bet, but if you have matched your company's full contribution amount , move your money to a Roth IRA. As a single person, you can invest the max amount of  $4,000 in a Roth in 2007 if your income is $99K or less, and make a partial contribution if your income is between $99K and $114K. If you have maxed out tyour IRA, you can save even more by switching back to your company's retirement plan.