Yes, I have the organ donor thing on my license, which is always on me. Nobody in my family would object. I have done what I could in the past. I donated blood twice, with no problems, but I barely reached the weight minimum. I later donating plasma for some cash; I was a few pounds too light to donate blood if I'd tried, but heavy enough to donate plasma. I needed 100 dollars for my upcoming rent bill and I didn't want to bug my family for it if I could make it myself. There was a promotion where if you donated 4 times in 2 weeks you got increasing amounts of cash. My blood pressure was only high enough to donate every other time, and that was after the employees there told me ways to temporarily increase it. After the 3rd time, it was like I was incredibly drunk- I could barely walk, my balance was gone, and i'm surprised I didn't pass out on the bus ride home. I was terrified that I would go into shock because of all the warnings that it could happen afterwards, but I didn't know the symptoms of shock, and I was terrified that if I fell asleep I wouldn't wake up again. When my mom found out, she told me that I was too small to be donating and that I should have just asked her for the money. The place called asking me to come in a 4th time. I told them no because I had almost gone into shock the last time (which is what I believed at the time), and the person on the other side of the phone told me "But it's $35, isn't that worth it?" I was too shocked by their disregard for my life to verbally respond. I have never believed that my life is worth that little, and a hospital bill would have put me into debt because I didn't have health insurance. I'll never forget being told that by what was, presumably, a medical professional.
I could donate my hair while I'm alive, but I won't unless I reach a point when I never want long hair again, and do a single big donation. I have friends and relatives who donated when they were getting a lot of hair cut off, but I'm not ready for that. It took me a decade to get my hair to the lovely, really long, healthy state it's in, and it doesn't grow fast. It reaches the bottom of my hips, my ends are healthy, and I get it trimmed a few times a year by someone who takes just a little off the ends and knows how to cut my hair straight. I don't know how many crooked haircuts I got before I started going to her.
TLDR: My organs are free once I'm dead, I can't donate blood or plasma anymore because of my small size, and if I ever decide to cut off most of my hair it will make a high quality donation.