Recognizing when you're living in your best years

I have a 4 year old son and I absolutely love taking him to have some ice cream (he loves Yogurtland). The excitement and smile on his face when he gets a treat he likes is the thing I will think about most when I'm on my death bed. It wasn't the new car or the promotion that will cross my mind, it will be about spending time with him and doing things which make him the most happy.