No advice, only I know people with cats that like to be up high and they simply learned to put things behind doors that they don't want knocked over by their cat. Yet one more thing about life with cats that isn't perfect.

None of mine get up on counters, so I can't help at all. Pouncer DOES get up and knocks stuff over on my desk and such.... which isn't bad now since I have learned to actually put my folders away like they should be anyway.... so he just helps me keep a clean office! LOL