As a teenager, I was really moved by Thoreau's 'Walden,' especially the part where he said something to the effect of; "...I wish to live my life deliberately, to suck the marrow of life so when it came my time to die, I could not say I hadn't lived." If I were to die tomorrow, I'd have no complaints. I've lived lives rich enough for 5 men.
... and I ain't done yet!