When time is limited, recognized UX Heuristics can be used to quickly identify issues with software interfaces. These heuristics are basic knowledge that a UX designer would have, and for researchers, learning them can help us better express our test findings to UX designers.

Source: https://www.nngroup.com/articles/ten-usability-heuristics/

Advanced goodui.org

This website collects AB tests and results that major companies are secretly doing, and summarizes the modification directions of major companies = current best practices.