Every girl had a diary at some point in her life, right? I know I did, and I remember it fondly. It was purple and had a little lock on the front. But as kids are known to do, I eventually lost the tiny key, so the personal records of my adolescence remain hidden behind the cover. These days, diaries don't have to be made of paper — there are lots of journal apps for your smartphones and iPads that will allow you to document moments while they're happening and keep a record of your most exciting days. Make a New Year's resolution to get to work on your own with one of these apps.