As you begin to shuffle things around to prepare for a move, remember to put items that you would like packed together, physically together. Movers don't organize. They don't have the time or patience and don't get paid enough to.
When I am working with a client who is moving, we go through each room and remove anything that will be donated, recycled, or trashed. While we are working, we organize items together that will be stored in a storage unit or other location and BOLDLY label the items with labels that say something like "TO STORAGE UNIT." If we come across a bath towel in the basement, we bring it to the bathroom and put it with the other towels so they will all be packed together.
Your time and energy spent on this task will pay off tenfold when you are unpacking box after box.
I saw this very clever and very easy-to-make ski rack at a client's house and couldn't resist taking a picture. To re-create: buy 2 long pieces of wood and some dowels, drill holes in each piece of wood (the size of the diameter of the dowels), and insert the dowels. I am inspired to do this in my garage! See, you really do learn something everyday :)