Jakob Nielsen's 10 general principles for interaction design. They are called "heuristics" because they are broad rules of thumb and not specific usability guidelines.
Usability
10 Usability Heuristics for User Interface Design
Knowledge
Five Questions Smart Managers Regularly Ask Their Employees — Thomvest Ventures
Not sure how to enable your employees to develop their career and professional capabilities over time? Here's an easy way to get started with a proven process that works regardless of the age or size of your company.
Leadership
Five Questions Smart Managers Regularly Ask Their Employees — Thomvest Ventures