If it is possible for one investment plan to fit everyone, this is the one. There are only two steps.
1. Invest as much as possible monthly through a 403(b) plan.
2. Invest it in a Vanguard index fund.
That's all there is to it. Anyone can do it.
Why is this the best plan?
How is the investment done?
For a real life story about a real teacher and how she had to learn the hard way, read here the story in the Los Angeles Times on December 21, 1999, about Susie. Here's another teacher story from August 2012 Money Magazine. Tim and KarenNOTE: Because Vanguard does not have a sales organization, most school districts do not have an agreement to transfer investments directly to Vanguard. In this case, an investor will have to open an account with another mutual fund company first and then, after the money has been sent, ask Vanguard to transfer it to the investor's account at Vanguard. Investors who would rather have an annuity with a fixed rate of return rather than being invested in the stock market should transfer their money to TIAA-CREF. (TIAA-CREF also offers very good, no-load mutual funds with low costs comparable to Vanguard).
Some of the good fund groups to use for this transfer are Fidelity (800) 544-8888, T. Rowe Price (800) 541-7853, and Dreyfus (800) 645-6561. All of these fund groups offer funds that do not charge a fee to begin a plan nor a fee to later transfer it out. For a complete list of fund companies that offer no-load funds you may click on No-Load Funds.