I'm getting into the busy season, so to keep up on the things I need to get done, I invented a new way of organizing my brain.
In Linux, all I do is create new empty files with names such as "Read Myth Book" and then when I'm done, I delete the file. On the left side of the screen, I have my class assignments, and on the right I have important non-school tasks or leisure time tasks I might forget. I don't know if Mac allows you to use empty files (Windows doesn't, I'm pretty sure), but I'm sure that folders would work just as well. I just like the ability to insert text if I need to.
It's extremely gratifying when you have five or six tasks and you pick them off, one by one, to reveal a clean desktop.