Better yet, every email is tied to my contact list so that when I click on the name of the sender and I can see important information like their class schedule or room number. That allows me to stop by whenever it's most convenient for them.
The part of Gmail that really helps me out are the tasks. I can convert any email into a task on my to-do list. That's great for a couple of reasons. First of all, it's a quick way of creating a reminder straight from someone's request. When I'm reading an email, I just need to click on the "more" button, then click "add to tasks". Done.