One way to keep track of random information is to write it down on sticky notes and stick them on the side of your monitor. Another way is to have a calendar on your desk where you can easily jot down important appointments. Yet another way is to jot down ideas on napkins, envelopes, or other random pieces of paper and stack them in a pile on your desk.
While such paper solutions may work, they can be clumsy and messy. A far better solution is to store everything electronically on your Mac using one or more of the following programs:
Notes: A simple word processor for ...