Scare the living hell out of them. Lol! But really.
People say cats can't be trained but we have trained both of our cats very well to our lifestyle... Personally I think declawing is rather inhumane (but I will not debate about it).
I even trained a cat that was already a few years old and new to us... People will tell ya a squirt bottle with water sprayed at them. Or applying vinegar or bitter apple smells on the location...but what has worked for me is just YELL "no", clap my hands loud, while getting up and after them, repeating the loud noises while continuing chase into the other room or wherever they are headed and then stop and leave them alone. You do this in an "all-hells-fury" mode a couple times and you will never have to do it again. Of course, later that day you want to pore on the love again and constantly let them know how special they are to you and how much you love them (thats a given for all pets, and assuming you know that outpouring of love just makes them a better animal anyway). Turning on the fury when they are somewhere they should not be has worked for me for years with more than a few of em. You don't need devices or chemicals or mutilation or anything like that.
With that said, the tape is a good idea too but we don't need it.
Another thing I do is to take the cats to their scratching posts and trees, put them in position, take their front legs in your hands and 'motion scratch' their paws on their allowed places. Scratching posts in more than one place in the house is good for them too. We have one in my wife's dressing room, where they are with her in the morning, one in our TV/HT set-up room and a small on up front in the living room.
I believe some animals can blossom into a more conscious being via your love, attention and teaching.
