Assume to pay for outstanding transportation costs. If a number of vehicles are involved, take care of all the logistics regarding who drives who. Print a calender to show everyone what will be shooting when. Be flexible and pace yourself. You can get angry at something, but never at someone.
Morale is the topmost priority.
Let no one go hungry. If it comes down to a question of money or people, let people come first everytime. In the world of low-budget filmmaking, people are worth a lot more than money, anyhow. Remember, if the shoot is a positive experience, people will be very willing to help out again. This is where the guide stops.