Creating a great user experience is liaison between technology, business,design and a good UX professional should be well versed with all three which results in a usable and workable solution. Knowing the business and providing the solution also clears the internal frictions within teams and helps achieve common goals. I do strongly believe that the days are numbered for those UX professionals well-versed in theory, but lack the supporting skills to execute the desired end result or some greater portion of it through their own means. One needs to be smart enough to adopt to Lean UX and produce a viable product in minimal time.
An interface should be humane; it should be responsive to human needs and considerate of human frailties and below rules help achieve them. Wanted to do this for quite some time for my personal reference and for the benefit of my fellow designers. Collated below are useful UX and Design principles which when clubbed with User Requirement, Business Goal andCreativity can deliver splendid results. Do add to this list via comment section.
Hick’s law says that with every additional choice increases the time required to take a decision.