But these vehicles come with their own particular quirks, and all are riskier than an FDIC-insured bank account.
Let's take a look at five investments you ought to know more about. While you shouldn't put all your money into any single one of them, as part of a diversified portfolio, each could have a role to play in helping you boost your income.
For more on smart investing:
- 4 Growth Giants That Have Turned Into Stock Bargains
- Target-Date Funds: Same Dates Can Earn Wildly Different Returns
- Bond-Market Crash: Is Disaster Ahead for the "Safe" Part of Your Portfolio?
You can follow Motley Fool contributor Dan Caplinger on Twitter @DanCaplinger. He has no position in any stocks mentioned. The Motley Fool recommends Enterprise Products Partners. The Motley Fool owns shares of Annaly Capital.