1. Communication skills. As Albert Einstein said, “If you can’t explain it simply, you don’t understand it well enough.” Whether you’re leading a team, managing clients, or training a new hire, the ability to communicate clearly and concisely is an absolutely essential skill. We must all develop the capacity to efficiently manage our communication channels (email, Twitter, Facebook, etc), to rally people around our ideas, and to play well with others – our coworkers and our clients.