I went to go do it before. I ate burger king a couple of hours before i went, and they tested a little bit of my blood first and said it had a bit too much fat in it, but they were gonna do it anyway. Than she checked my pulse and said that it was too high because i was nervous or something. She told me to smoke a ciggarett before i came in the next time, but i had already done that so i guess im never doing that again. They send me a postcard in the mail every 2 weeks saying im eligible to give more blood, and for every person i bring i get $10 bucks ontop of the $20 they give me. Oh well.