I recently bought a moleskin because I wanted to see if I could find a better way of tracking tasks. I've tried using RememberTheMilk (but that's just really a list of long-term goals and ideas now) and Wunderlist, but I seem to always go back to paper on my desk. Gonna give Bullet Journal a try, Ryder Carrol did an awesome job on this website. If ya need a pen, WireCutter's got a great article on "The Best Pen".

"Your Mac's default PDF reader, Preview, does let you add sticky notes to pages, but Skim throws highlighting and circling into the mix, giving you more note-taking options. In addition, you can see all of your notes in outline form and jump to their locations, making this a great tool for marking up PDFs. Your notes are saved in the PDF but will only be read by Skim, meaning you can get a clean version back at any time by just opening the file with Preview. Skim is free, requires Mac OS X."