Hopefully, you're moving to California for happy reasons. That doesn't mean, however, that moving to another state is going to be any easier. You'll still need to log many, many hours packing, dealing with paper work and red tape, and setting up shop in your new home.
How do you find the least expensive interstate movers who are still guaranteed to get your stuff cross country in one piece? Moving companies regularly misquote the cost of a move. Unless a moving company is willing to guarantee their rate, expect it to double or even triple.
Try to find a good deal on supplies, like packing tapes, wardrobe boxes, mattress pads, etc. Don't just buy the first set of supplies you see. Do some research online, and you'll save yourself a lot of cash.