1.Get healthy. You have to figure out a way that you can sleep. I don't sleep and I get sick on set, so you have to get into a good sleeping rhythm. If you go down hard, then you won't be a good director. You have to find a good sleep pattern.
2. Read the script every day and make sure that there isn't a piece of fat on the script. When you're working on a lower budget, you can't waste four hours on a scene that won't make it in the final cut.