Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.
礼貌，并不需要花钱。用完马桶后，把马桶盖放下；上电梯时，耐心等别人出来再进去；把购物车放回指定区域；在借东西时，归还时要东西的状态要比你借的时候还要好（例如给车加满油、把物品清理干净）。
"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."
"In tennis, like in life, you have to keep moving forward—one point at a time."
The greatest killer of happiness is comparison. If you must compare， compare yourself to you yesterday
The biggest weapon against stress is our ability to choose one thought over another.
