Spend 2-3 times your set-up time planning
If a set-build requires 20 minutes to put together, spend a full hour planning how you are going to do it. If it’s a 3-hour set build, be sure you spend 6-8 hours planning prior to going to the venue. What is the shortest route from the loading bay to the room? Do you know what exits they will and won’t allow you to use? This can make a critical difference to your set up times, and the eventual success of the gig.