One of my favorite applications for organization on my computers and iPhone is a great little app called Evernote. I originally had checked it out when Jott got rid of their free accounts. I use it mainly as multimedia to-do lists: one for work, one for home, and another for freelance jobs, when applicable. Now, I can’t imagine going back. The article below gives you some insight on even more ways to utilize it.
Evernote: Remember Everything on Your Mac