From one old guy to another, take it to the dealer and let them winterize it. They guarantee their work, and you don't have to crawl around on your knees trying to find things that you can't even see while trying to work on them.
Many years ago the dealers around here charged $50 to do it. Now they are up to $100 to $150, depending where you go, but it's well worth it.
That's also a good time to get those little things fixed that you have been putting off, too.
Then take it to your local, friendly body shop or auto detailer and have her washed and waxed.
Now you're ready to put her to bed for the winter, and your knees, hips, and shoulders aren't killing you. Great, huh.