thoughts on preparing;
basic research about the company and verbalize some facts about them in the interview.
provide clear and concise answers to their questions.
ask them questions about temp/perm, team sizes, typical workday for the role, software/programs used, typical hours, THEIR expectations for first 3 months/probation.
,....
now depending on the job, I might already have a small package readily available with some jobs/things I've deployed but I would never go farther then that. they want me back for another interview, sure .. taking tests? MMM... maybe... doing actual work? Ill walk out of the interview unless I REALLY need the money, or it's triple my wage.

yeees, I want to buy from someone, not something. It drives community which feels nonexistent