I donated blood just yesterday. Unfortunately, I'm AB+ which means my blood is only suitable to other AB+ people.

Right on! (I'm O neg). Re: the schedule, try scheduling your next donation every time you have a blood appointment, then just changing it to a more convenient time closer to the date.

On the topic of diet, LessWrong helped me losing about 17 pounds through implementing some short term motivation methods. Counted in the probability of more years at life that's a huge win.

I'll say! That's what I was hoping to hear... it's not all about using the skills you learned on LW to develop a theory of quantum gravity or whatever.