Organization. I love getting things organized. My closet: color-coded. No joke. It looks like a rainbow.
My books: alphabetized by author. My only problem really lies in keeping it organized. I get lazy and distracted by other things. However, when it comes to calendars, oh baby, I am all over that. I keep a paper calendar for work as well as my outlook calendar. For my blog I use Trello, which is an organization site that is similar to Pinterest but for tasks. I use it to organize my blog posts and ideas.