I think it's a good thing every so often to sit and ponder what it is in your life that you take for granted. Because when you begin to appreciate the little things, you can no longer accuse yourself of taking them for granted.
I like to play softball. I've been playing for around twenty years and I still enjoy it a lot. Not that I want to get all braggy on myself but, I can still play. On my Monday night team (I play on a different team on Friday nights) I am 'the old guy'. It's a co-ed team with players ranging from 19 to 48--which of course would be me. I play outfield. Wherever they want to put me is fine. I love to run and dive and catch and throw. All of it is just excellent!
Essentially, what I'm saying is: I am glad that even though I have an extremely physical job, I still have a healthy enough body to play a game that I enjoy that lets me feel like I'm still a boy every time I play it. It may just be a little thing, but it IS the little things we take for granted.