I've been GMing for 20 years and have recently started to question if I need a GM-makeover. We are still having fun but could the game be more fun if I shed some bad, and well ingrained habits? I cannot see the wood for the trees and am looking for suggestions that I can be wary of.
This cannot be system specific because our group only play free RPGs.
Please keep the answers for experienced GMs only. If your answer is also useful for Newbie GMs, then please put it in the Biggest GM pitfalls for new GMs question that this is aimed to be a counter point to.
(As many pitfalls per post as you like!)