Once upon a time, Americans worked for 1 employer for an entire lifetime. They also got a pension for their years of service. Back then, you didn't have to save for retirement or make any of the accompanying investment decisions.

Today, only government jobs and a small number of large companies still offer pensions. The rest of us are on our own. Unfortunately, the average worker is faced with an alphabet soup of retirement options -- everything from the 401(k); to the 403(b); to the SEP if you're self-employed. Just figuring out the terminology itself can exhaust, bore or intimidate you.

Once you get past weighing the merits of a 401(k) or a Roth IRA, for example, then you have to choose individual investments to actually put your money in. Most people don't have the first clue. That's why Clark compiled his investment guide to give you a starting point.

Clark is a big fan of targeted retirement funds, which offer a very hands-off approach to retirement planning. With these choices, you pick the year you expect to retire -- let's say 2040. Then you buy the 2040 portfolio and sit back. Over the next 30 years, the company you choose picks a mix of stocks and bonds to get the best returns with the lowest overall risk. As you get closer to 2040, your investments automatically become less risky.

Forbes now reports there are 289 different targeted retirement funds in the marketplace. So which company offers the best? That would be Vanguard. This financial house offers no load mutual funds; no hidden 12b-1 fees; and management costs that are about one-sixth the average of other companies. T. Rowe Price and Fidelity Investments are also good places for your targeted retirement funds. You can't go wrong with any of these 3 low cost houses.