let go of what you can't control

http://elitedaily.com/life/motivation/10-habits-quit-happy/
The best thing you can do is to let go of what you can’t control, and invest your energy in the things you can – like your attitude.

http://shakeoffthegrind.com/emotional-health/free-yourself-by-letting-go-of-what-you-cant-control
When life seems completely out of control, there is always something amidst the chaos that can help us regain a sense of control.

we can always learn to control our attitude.
When things seem bleak looking at things from a humorous perspective can help lighten the load. Look for humor in serious situations and use this as a tool to release your grip on control.

Keep a sense of humor