I initially saw this video last month and for some reason keep forgetting to write about it, even though it's amazing.
Randy Pausch is a 46-year-old professor who has terminal pancreatic cancer. He was told back in August to expect three to six months of good health. He's married and has three preschool-age children. Despite this sad situation, he is in great shape physically and gave a remarkable lecture titled “Really Achieving Your Childhood Dreams.” You would not know by this man's demeanor that he is dying. It's about an hour and a half long, but I recommend taking the time to watch it, you'll be inspired.