The man in the planning room, whose specialty under scientific management is planning ahead, invariably finds that the work can be done better and more economically by a subdivision of the labor.
Celebrate your successes. Find some humor in your failures. Don't take yourself so seriously. Loosen up, and everyone around you will loosen up. Have fun. Show enthusiasm. Always.
I always cheer up immensely if an attack is particularly wounding because I think, well, if they attack one personally, it means they have not a single political argument left.