Focuses your mind on important objectives
You are less likely to forget to do tasks
Writing a list helps order your thoughts
It helps show the bigger picture
You don't need to hold everything in your head.
It saves time
It helps you decide on priorities: the most important and the most urgent
You are less likely to become sidetracked
You get the reward of ticking off your achievements
You feel more in control
You have a record of what you've done
You always have something to work on