Peanut likes to jump up on the furniture and tables. Somewhere I read that if you put foil on a surface, cats will avoid it. So I have foil on the backs of a couple of my couches. It's not as bad as wearing the foil on my head, but it does look a little crazy to have foil on your furniture.
The other day I had people come in the house. I planned ahead and hid the foil so they wouldn't look at me funny. As the people were leaving, I look over at the couch and Peanut is lounging like a lizard in the sun. I shake my head and Peanut lifts one sleepy eyelid as if to laugh at me.