Successful people know that in order to stay on top of work and become successful, they need to be disciplined and be smart with how they manage their time. In order to do this, they plan their days ahead, putting together a to-do list at the start of the day — what needs to be done and in what order. Not only are they going to make sure that they don’t miss out on any important task or meeting, but also optimize their time for the optimal performance.