OneNote is excellent for keeping your notes organized and shared between your devices. I myself use it on PC, iPad and Lumia (820), sharing&syncing the notebooks via OneDrive (Pro) and it works excellently. I have my travel plans, the kids' school schedules, work projects, work notes etc. all in OneNote workbooks and it's easy to find what I'm looking for and check things wherever I am on my phone etc. Sales pitch ;) But I truly do love it!
Download OneNote: http://www.onenote.com/