Grammy211 pretty well covered it (and the articles will help, too). Practice getting in and out of your shower/bathtub with a knee that doesn't bend well so you're comfortable with the process. I picked up a shower stool and a hand-held shower head to make the post-surgical showering process as easy as possible. I used that for three or four weeks afterward.
I'm still using the raised toilet seat. I was nearly ready to take it off, then I cracked my patella, so a few more weeks with it.
Set up your "nesting" spot on a chair, sofa, or bed that you can comfortably get in or out of and have all your conveniences within arm's reach -- remotes, phones (if you still have a land line in addition to your cell phone), grabber, chargers, tissues, books, notebooks, pens, coloring books and pencils -- whatever you plan to do to pass the time between naps. Some people experience brain fog for several weeks or months after surgery (I did after the first one) and can't concentrate on anything very long -- for that, your TV, VCR, DVD player, satellite, or Netflix, etc are your friend. Put something mindless or inane on and let it play. I finally watched all my George Carlin DVDs -- he wasn't always as funny as I remembered him. I also replayed my SportsNight series, and that was every bit as good as I remembered. Lots of people binge watch series they never had time to watch before.
If you're assigned any physical therapy, remember to never let your physical therapist hurt you. If they lay hands upon you, it better be for a specific massage purpose and not to force your knee to bend. PT may be uncomfortable but it should never hurt. If it does, stop and ask for a different approach.
Make a list of questions for your surgery team as well as us and let us know how we can help.