Time management means being able to say “no”.
Whenever someone comes running to you saying “I need your help,” it’s automatically an emergency. You’re a team player, so you may say “Sure, I can help you with that” without thinking.
Less obvious but more common is the failure to prioritize tasks. How many times have you worked on a diagram, tweaking and tuning and rearranging until you realize you’ve spent half a day on a picture that only reinforces existing text? Was that critical to the project? Hardly.