Before you know it...

Time runs out. Anything past 50 is definitely borrowed time, though for some reason everyone has the number 65 burned in their mind for retirement and most people presume they will live beyond the frequently quoted life expectancy of 75. I'm not sure if 75+/- 2 years is the mean, the median, or the mode, but roughly speaking about half of the population must die before 75. The conservative assumption is that You (meaning you) will die before 75. And ask yourself, exactly how much fun does the 65-74 year old club have, anyway? Very few are skateboarding or sky diving. There are exceptions of course. You future Senior Olympic participants can stop reading right now. For the rest of you, wake up. It was all a big joke up until age 50. Now the next 10 years are the most important of your life.

"Your 40's are the old age of your youth, and your 50's are the youth of your old age."

It's in quotes because I didn't invent the observation, but I don't know who to credit it to. But think about it. Young people regard someone in their 50's as being irrelevant, while the 70+ crowd looks at 50 year olds and think they are just snot-nosed brats. So, 50 year old dudes and chicks: it's time to rock.