Learn not to worry about things I can't control

I've worried last few weeks.  About so many things.  At first was running the innovation workshop in China, the invitation came too late so I had to decline.  Then is the ski trip and the weather; my right knee; the keynote speech at Defense Language Institute; the refinancing; the BPPE; the tires on the Lexus; the international recruitment plan; the online master degrees; hiring faculty, Brian leaving the country; the StartupWeekend, ..... too many to-dos, inspirations, wants, greeds, ambitions, and too little time, resource and talent.  Sigh.

Have to plan, execute, review.  But the more challenging one is how not to be worried and depressed about things that is out of my control.  Since there is not much I can do about them, worrying does not produce any results.

Hopefully the weather will turn nicer so I can ride my bike more, that is a proven method to reduce stress.