Also, tell your phlebotomist at the start that you're concerned about fainting, so they can watch you for signs you might not notice. Do not look at the needle. Do not skip the snacks, even if you think you feel all right. Make sure you eat a good meal with protein and carbs an hour or two...
Let's keep this thread current so it stays in people's minds. A lot of people just get busy with life and don't think about it.
In other news, I'm eligible to give again! I have an appointment for the 14th of February. How appropriate!