Make a small list every day of the items you need to do. Use checkmarks and track your progress throughout the day an notice which thinks out side the list, eats you time away. Run with the system a week and use the result. First the list helps you notice how much you get done throughout the day. Most people seem to work more by the clock than by tasks. By planning tasks and noticing the task progress, you learn how much you handle on a day and hopeful get better at guessing how much time a task actually takes.
Secondly it’s a damn easy way to notice if you do the right tasks. Are there any time robbing tasks eating away and if so can you get rid of them?
Finally every time you strike a done item from the list, you get a sense of accomplishment, and isn’t the felling of getting thinks done nice?