When I put together my ’30 before 30′ list I made one rule for myself. Nothing that would feel like an insurmountable challenge. Which is why so many things so far have been movies I haven’t seen, books I haven’t read, etc. But I put a few items on the list that I knew would be challenging. Donating blood is what I figured would be the most difficult item. And do I ever hope it ends up being the most difficult because my experience giving blood was terrible. I had never had my blood drawn before so I had no idea what to expect going in. Well…even with taking all…