I agree with Roger re what if the DB has a major crash - all your notes and instructions are gone too.

What occurred to me was that there should be a "Maintenance and Instructions" container on instance but outside the database. Whenever you create a new DB, a new M&I is created in parallel with the same name as the database. You would use it to set up your maintenance plan and tools and documentation. Then you would have your database and your 'operators manual' with the same name. They would always exist in pairs and SQL Manager would alert you if one was missing.