Less common DMing advice.

[Velaryon]

[*]I love Rules Lawyers, its like having an AI enabled rules book that can find that annoying table I'm going to need in 5 minutes.

As an addendum to this - learn to tell the difference between an actual Rules Lawyer and a fake one. Some people have the Rules Lawyer personality but don't actually know/understand/interpret the rules as well as they think they do. Learn to spot these so that you don't rely on their "knowledge."