It’s a great idea to write. It stimulates your thought process and helps you keep track of your ideas and goals so you can see exactly where you are with them.
Of course, no one can write everything down. But getting into the habit of carrying a small notebook with you and writing things down when you remember to do so gets you in the habit of writing.
Try it- write down your ideas and goals for a week- and see if at the end of that week if you don’t have a more solid direction to go in with some really good ideas on how to get there.