Go to class no matter what, even if you don't feel like it.
Even when you are sleepy, tired, or sick.
You still paid for it.

You can't always count on notes from others.

My first class was at 8 and I just wanted to sleep in, but I like physics so I went anyway.

My second class was at 12. I went, but I felt really sick and left early. Still got something out of it. I'm going to the doctor to see what's wrong, because this has been going on for the past 2-3 weeks.
(I'm mean to my body.)