What do you call it when you work or try less hard than you should?

During the long lecture, my mind started to _, and I completely missed what the professor said about the homework.

Your groupmate talks loudly on the phone at his desk, and it completely ruins your concentration. This is not just annoying, it's your biggest _.

If a task or problem is not dealt with, it is an _ issue.

After a long vacation, returning to work can be _. It's a difficult and unpleasant change.

You have 5 meetings from 9 AM to 2 PM without any pause. These are _ meetings.

If you only do the tasks you absolutely must do, and nothing extra, you are doing...

Before you lift heavy weights, it's important to _ your muscles to avoid injury.

You wake up feeling extremely tired, slow, and unable to think clearly. You are not ill, just very low energy. You can say you feel _ or _.

To make a small, careful change to something to improve it (e.g., a plan, a recipe, your posture).

A person who starts their own business and takes financial risks is called an _.

Name THREE verbs or phrases that mean "to annoy me extremely".