If you could choose just one skill or emotion to build the rest of your life on. Choose ENTHUSIAM!!! There are others that may bid you well. But I would bet on ENthusiasm.
Enthusiasm conquers your fatigue, it will give you added energy and add energy to others around you.
Enthusiasm conquers suspicion in others.
Enthusiasm makes others want to communicate with you.
Enthusiasm makes others overlook your small shortcomings.
Enthusiasm not only creates instant friendliness and trust, but also leaves friendliness and trust behind it.
Enthusiasm makes others willing to link their names to yours.
Realize everyone has enthusiasm and the more you use it, the stronger it gets. Has your enthusiasm grown rusty? Give it some practise and it will gleam and glow. Bring it right out where everyone can see it. How long has it been since you've believed in something and sounded off about your enthusiastic belief? Practise your enthusiasm and it begins to swing and sing.