Another great use for your calendar, day planner, etc. is as a memories keeper.
Record your child's first steps, first day at school, first hair cut, lost their first tooth or just the funny things your children say or do.
It's a place to write your personal journal entries. Write notes to yourself or just details about your day. Ex. Dr.'s appt.: Dr. Doe said to start stretching my back more to avoid injury.
What about your home business successes or ideas? Maybe you want to remember to research the latest marketing techniques or the name of the latest book to boost your business. Well, write them all down in one spot, so you can refer to them often.
Just another way to put your calendar to use.