Bogleheads:Featured article/Investment policy statement

An Investment policy statement (IPS) is a statement that defines your general investment goals and objectives. It describes the strategies that you will use to meet these objectives, and contains specific information on subjects such as asset allocation, risk tolerance, and liquidity requirements.

Alternatively, you could consider using a simpler investing plan (see below):
 * If you find creating a full Investment Policy Statement too complex
 * If your investment objectives do not justify the effort needed to create an Investment Policy Statement (more...)