Get an order for physical therapy. You will need to learn exercises that will strengthen your muscles for the surgery. It also will help your pain. I wore a Velcro brace prior to surgery . I walked as much as possible daily as well- lubrication to the joint!
I had purchased a large gel ice pack that was awesome. Really helped. And if you can, take NSAIDs (non-steroidal anti-inflammatories such as Motrin, Alieve...)

Narcotics are for after, when you really need it.