I believe the most important part of organisation is finding a diary that works for you. For me, this Busy B Busy Life Academic Diary is perfect - this particular one is now out of stock as it's an academic diary, but the 2016-2017 edition will be available soon, alternatively there is still limited stock of the 2016 diary available here. My favourite part about these Busy Life diaries is that it is made for those of us with 2 schedules - for me that's home and school - and therefore is a week-by-week view for the same dates on both pages. I find this to be an absolute gem as I was constantly cramming all my home life schedules in my tiny school planner. Now I am able to plan my home life on the left, and my school on the right but whilst remaining with just one diary!
Additionally, this diary also includes a page for your timetables, important contacts, references and notes. Each page also features a reminders box where I like to write my weekly To-Do list. The diary is divided into 3- month sections, separated by a pocketed page to store any receipts, appointment cards etc, along with a pocket at the back. To ensure everything stays together, the diary is bound by an elastic band and features a ribbon to ensure allow for quick access to the week you are on.