If you've never been organized before in your life, now is a good time to get started. Time is always a precious commodity, but it is even more so during your years in medical school. There is a lot to be accomplished, but there are still only twenty-four hours in the day. If you are disorganized and don't learn to set priorities, stress will be the overriding factor in your entire medical school experience. If you set up workable systems for yourself early on, your anxiety level will decrease dramatically.
Some people keep a running list that they constantly update.
Others prefer to make a new list every day. Either way, prepare your list each night before you go to bed. When you wake up, you'll be fresh and focused, and you'll know what needs to be done that day. If you constantly feel pressured, if you're always worrying about all that you have yet to accomplish, you won't be able concentrate on the task at hand. That's why time management is an absolutely essential skill for a successful medical school career.