I was telling my dad last year how I wanted to backpack the Colorado Trail. All he said to me was "Don't wait too long". The way he said it, his emotions and actions really had an effect on me.
I am doing the Colorado Trail this summer and pushing towards everything I should of done 10 years ago. (Trekking in Nepal is up after and I will be sailing around the world 8-9 years from now)
So, don't wait too long.