The main goal of Card Sorting is to improve a website’s or an application’s Information Architecture, to help designing how the information is organized and labelled.
Workshops
Card Sorting — UX Knowledge Base Sketches
Knowledge
Some of the Basic Websites & Technical SEO Checklists
User interviews have become a popular technique for getting user feedback, mainly because they are fast and easy. Use them to learn about users’ perceptions of your design, not about its usability.
Interviews
User Interviews: How, When, and Why to Conduct Them — NN/g