Always consider the state of things before you start. For example rechargeable items. Now, I don't want to start a flame war about using rechargeable batteries in things like wireless mics. This is about other items. I see the set department cussing on a regular basis because the last person to use the cordless drill didn't recharge the battery. Wireless intercom sets are often victim because they are usually a low priority item. Then when they are set up 30 minutes before rehearsal they are dead. Think about EVERYTHING that needs to be charged up and unload and set these things up first. Pack in the truck last so they are easy to get to. Here is an example of a manlift that ran out of juice in the middle of a high dollar resort and had to sit there while the battery charged enough to move it a few more feet. It was amazing that no matter how much the house manager yelled, the battery did not charge any faster.