I don't have a fear of getting older, I have a fear of wanting to do so much, but so little time. I would love to have a life support system like Mr. House's in New Vegas. Fill a computer with multiple softwares of encyclopedias and etc. I could be a genius and help the world in my own way. It's a shame that our lives are so short. I'd love to live to 200+ like House. To live so long and preserver the past in all it's glory, that'd be a dream come true for me.
Or it could be a nightmare as you watch the world work against you, slowly becoming something you despise, but your powerless to stop it.
I think of it as leveling up. Hmm, where should I put my attribute points this year? Ooh, a 5x multiplier, nice!
Only you get weaker as you level up past a certain level.
Im 18 soon, no idea what todo with my life, but im just looking at places I want to see in the world before I die, today I found out about http://en.wikipedia.org/wiki/Grand_Prismatic_Spring thats a place I have got to visit, to see for myself. Just make a list of things to see/do and try to do as many of those as you can.