Be prepared for some spills, and think about how you plan to fill bags with sauces. You can hold bags for each other, or you can place bags inside large bowls or large empty cans to steady them.
Have Sharpies handy for marking.
Freeze in quantities that make sense for your family (rather than what a recipe might recommend).
I also freeze certain entrees in different sizes (3 cups red sauce for small pasta meal, 6 cups red sauce for my chicken parmigiana recipe, etc.).
I like to look over my recipes for ones that have common ingredients so that I can save time pre-measuring ingredients for the next recipe while I have them out for the one I am currently preparing.