Mine just had knee surgery last Thursday; so I am a couple of days ahead of you.

Words of advice from a tired husband:
1) Ice. Lots of it. Use it constantly.
2) Get a CPM machine. My wife HATES doing it, but we can see the range of motion increase every day - its nuts. She looks back each day and is glad she did it.
3) Do the PT. Do it all. Ignore the horrible things coming out of her mouth while she does it.
4) Stay ahead on the pain management. Its way easier to deal with it before it becomes a major problem.

Good luck and I hope your wife recovers quickly!