This is the kind of memo I like to see:

Just a reminder that we're meeting in the tomorrow for Pro-Seminar. A few tips to make the class productive:

Plan to arrive by 4:40 so Linda Jones can begin her presentation on time. That will leave us ample time at the end for individual questions and assistance.
Work through the ERIC/EBSCO tutorial before class.
Have your topic and likely keywords handy to make the most of your search time.
Sit right up front by the instructor station. Since we are a small class, other students may come in to use the open computers. We'll be a cohesive group if we are located together up front.

See you promptly at 4:40