Most people who are planning for retirement fund their 401Ks and use financial vehicles like mutual funds, bonds and securities to save money. But you may have overlooked life insurance in your planning efforts. Although there are some caveats, certain forms of life insurance can provide funds in your senior years. "In most cases life insurance is probably not appropriate until all of the tax qualified plans -- IRAs, 401Ks, etc. -- have been maxed out and one doesn't have any more of those vehicles to invest in," says Rob Drury, executive director of the Association of Christian Financial Advisors, a non-profit coalition of over 3,000 financial advisers based in San Antonio. But if you're looking for an extra boost, here are three insurance options.