What other tax-favored investments should I consider?

For growth stocks you hold for the long term, you pay no tax on the appreciation until you sell them. No capital gains tax is imposed on appreciation at your death.

Interest on state or local bonds ("municipals") is generally exempt from federal income tax and from tax by the issuing state or locality. For that reason, interest paid on such bonds is somewhat less than that paid on commercial bonds of comparable quality. However, for individuals in higher brackets, the interest from municipals will often be greater than from higher paying commercial bonds after reduction for taxes.

For high-income taxpayers, who live in high-income-tax states, investing in Treasury bills, bonds, and notes can pay off in tax savings. The interest on Treasurys is exempt from state and local income tax.