The Internet is full of business plan/investor pitch outlines (here is a nice one from Sequoia). Use these guidelines as a check list to see whether you covered all the content that investors expect. But do not stick to them too literally. A rigid, generic, structure kills the spontaneity of your specific story. Do not simply copy the sections of the structure and use them as (boring) headlines for your slides, instead write headlines that mean something (The Solution is not very meaningful). The text book approach to TAM calculation might not exactly fit your specific market.

All advice (including the one you will find on this blog) is given to help you. In the end, it is you who makes the call what to use, and what not.