Performing both at your best and incenting others to do so is a good way to achieve happiness.  It makes me feel good to see others succeed and to do so myself.

Hence a core motivation for getting things done is simply the pleasure derived from success.  Making sure you and everyone involved in the performance understand what the results are and how attaining them will make all feel good.

Trust and Respect

Treating both yourself and others with trust and respect is a basic underlying behavior to enhance the motivation (trust and respect begin with how you view yourself).

As a default, perceiving everyone is being treated fairly and respectfully results in everyone being inclined to do their best and creates a high-performing culture.

Clarity

Building on trust and respect is just as important.  We all need to know why we do are doing something and personally believe in the value of doing it.

This understanding leads to buy-in.  When we care about what we are doing, appreciate it and anticipate the results we are far more likely to perform at a higher level.

Beware the Poisonous Environment

Some cultures are so poisonous that people only care about themselves and will never take any risks that might have negative personal consequences.

Success and strong positive results are founding on trust, respect and creating real understanding.  This leads us all to care about both our own achievements and those of others.  We are willing to extend ourselves for the greater good.