Deciding on what's unimportant and can be packed first is a good place to start. After de-cluttering thoroughly, packing any books and out-of-season clothes, you can start deciding on a packing schedule. Your packing schedule should take into account any redecorating or repairs you want to undertake - and should also allow for anything you need to use.
These essentials should be packed over the last day, so don't leave out too much - or you'll find it very difficult to finish packing on time. Wardrobes, your garage, and shed can be packed as one of your first tasks. If you don't use your garage and its secure, you could store boxes there - or in cupboards.
Books, videos and DVD's are a good place to start, leaving your essentials out until you are about to move. Packing your bedrooms, toys, and clothes should take place over the four weeks preceding your move, but you may want to consider packing as much as you can and keeping out only essentials. Home offices should keep only the items they need to complete and fulfill orders over the duration of the move - and pack anything that you don't use as often.
Packing your dishes, cutlery and cooking utensils is probably best kept for last. Packing of your home office materials you use regularly, as well as anything like shampoo, toiletries, and work uniforms, as well as equipment you use for your work, is best done over the morning of your move. Packing may take over four weeks, but it's worth it.