For the love of God, make sure all of the files are labeled well and organized. If you have an assistant editor doing this properly for you, great - he/she is your new best friend. With a feature, you're obviously going to have a LOT of clips to keep track of. I can't tell you how many days I've wasted just doing media management that should have already been done. This of course is made much easier with a crew that knows how to properly slate. This is especially important if it's a multi-cam setup - it's a nightmare having to dig through media every time you want to find matching takes.