"The price of LEADERSHIP is RESPONSIBILITY."
...and part of that responsibility is to STAY POSITIVE whether you feel like it or not.
Managing your attitude is a very personal thing. However, the most important factor is exercise. Attitude and energy levels are directly tied to exercise. I can be doing everything else right, but without regular exercise I can feel my attitude heading south.
Exercise, more than anything, is a "stress buster." And, don't kid yourself, stress is a killer. In fact, the World Health Organization estimates that 80% of all illnesses are directly or indirectly caused by stress. Therefore, if you're not proactive in busting stress, it's very likely to come back and bust you!