Totally agree with Brooksy.
Filmmaking is a collaborative process, each department (camera, lighting, sound, etc) will bring something extra to the table that you couldn't on your own. Yes, as the director it's your vision, and everyone should be working to achieve that as best as possible... and like Brooksy said the key is preproduction.
Even on a no-budget film pre-production is the most affordable part of the film, and skimping on it will make everything else more expensive -- even if that expense is just wasting peoples time through inefficiency.
Break down the script. Make a list of every prop necessary for each scene, then further break down that list to the individual shots. Do the same for cast, wardrobe, locations, sound, etc..
Storyboard EVERY single shot. Plan every shot, stick to your plan. If some brilliant idea for a new shot comes up on set, add it to the list, but still shoot the planned shots. If you're painfully behind schedule already, skip the brilliant new shot and go with the plan.
If something isn't working, don't fight the process to try and make it work, adjust and move on. Shoot for the edit.
By the time you finish post production you will have made three distinct movies.. the one that was written, the one that was shot, and the one that was edited. This is the way it works, it's an evolving thing, accept it, expect it. And finally, once you do reach the edit, don't be afraid to kill your babies.
If you don't catch the last reference, read the dv rebel's guide.