Three things I've learned in my many years in IT.

And I think this applies to pretty much any vocation -

Three things you need in order to survive or even flourish in any vocation.

1. Being able to meet deadlines and follow through on commitments. No one can trust a flake or someone who isn't reliable.

2. Being able to interact and communicate with others in the environment. No matter how much knowledge you have, no one will work with you if you think the world revolves around you, or you lack the patience to listen to others.

 
3. Handing adverse and unknown situations while maintaining composure. No one will want to work with someone who loses their shit when under pressure.