Which is worse?

Procrastination or efficient time management and days of idle time?

Procrastination. There are many beneficial things you can do with your idle time with a little effort.

Definitely procrastination. Cumulatively, you can lose years of your life that way.

IMHO procrastination or the waste of time is one of the worst things you can do. Once the time is gone you can never get it back. procrastination is a bad habit and could lead to problems later in life. If you have things/work to do and you procrastinate you are just adding pressure to yourself. The work still has to be done you will have less time to do it. Why do that to yourself? when you procrastinate you are cheating yourself