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.
Learn a logic-driven approach to design intuitive, accessible, and beautiful interfaces using quick and practical guidelines.
This graph shows the stats of mobile screen resolutions worldwide based on over 10 billion monthly page views.
Laws of UX is a collection of best practices that designers can consider when building user interfaces.