This would be a good day to combine your creative and executive abilities. Organize a holiday arts festival for your kiddo: puppet theatre, karaoke stage or dance studio. You'll know just how to inspire them to the fullest.
You rack up some new glory and should be able to get to a new level of power at work or in some important hobby. Make sure that you give others the chance to benefit from your expertise.
It's no good dwelling on what was or what might have been. Your body is changing, and it requires a different kind of nutrition than it did a decade ago. So listen to the messages it's sending you and feed yourself so you stay healthy and strong.
Any activity is good activity now. Swim a few laps at your local indoor pool, invite friends for some evening ice-skating or just walk home from work tonight. It'll leave you positively glowing and wanting to learn more!