The document outlines several long-term investment plans available in India for periods of 10-15 years or more. The Public Provident Fund (PPF) account is described as the best long-term plan, as it offers security for 15 years with tax-free returns and the option to withdraw half the amount after 6 months. Investing in mutual funds through a Systematic Investment Plan provides risk and return, especially for long-term investors. Real estate is presented as a growing industry that can provide high annual returns through purchase, management and sale of properties. Other options discussed include investing in gold, post office savings schemes, initial public offerings, bonds and maintaining a diversified portfolio to reduce risk.