So, you may know I'm a big proponent of blood donation, and that's not changed, but I do need to make an important PSA on the subject: If you choose to become a regular donor, please be careful about your iron intake! More specifically, make sure you keep up your iron intake. Take a supplement if needed. Anemia can and will happen if you're not careful!
In particular, if you give blood regularly, keep your iron intake up, take a supplement if you need to, and don't be afraid to stretch out the distance between donations more than just the bare minimum. A 6+ month wait between donations is better than having you get all anemic.
This PSA brought to you by the Anemia Fucking Sucks Ass Foundation