Happy Project For Awesome Day, the day in which Nerdfighters comment and rate the crap out of every video sporting the P4A thumbnail...provided it is about a charity, of course.

Give blood! Its FUN, its FREE, and youll save a life. And get free biscuits. Win, win, win, WIN!

Here are the links with more info:

Scotland: http://www.scotblood.co.uk/
England & Wales: http://www.blood.co.uk/
Northern Ireland: http://www.nibts.org/
Republic of Ireland: http://www.giveblood.ie/
USA: http://bit.ly/JBXAx
Canada: http://www.bloodservices.ca/
Australia: http://www.donateblood.com.au/
New Zealand: http://www.nzblood.co.nz/
Germany: http://www.drk-blutspende.de/startseite/index.php
Sweden: http://www.geblod.nu/ (thanks omgemo! ^_^)

(I had difficulty in locating the non-English speaking countries blood donor websites, because googling, for instance, Netherlands Give Blood, yields precisely bupkiss. On the plus side, I now know the words for blood in many more languages than I did yesterday. BLOED! SANG! VERI! DEMM!)