Hmmm this is hard one. I know Ragdolls love being up high. This is a nightmare for all the kinds of reasons you have stated, I have a lovely unit with lots of little drawers in it (cannot think what they are called) and a lovely vase on top with no flowers. Misty likes to pull them out, resulting in them falling over, I have lost count of the number of time she has done this.

If I am cooking Misty usually has to go to her room (espcially mince or chicken, bacon) as she will jump up and it's very stressful cooking and kitty watching, much as i am able to multitask!

Then there is the ironing board. They lie on it, even when the kittens were here they used climb up the cupboards to get to it. Result = no ironing, although I could put them to their room.

I would go with the advice here and just keep at her, saying firmly NO and putting your finger on her nose. (Works for some) and yes, after cooking I always have a few pots of water ready to put on cooker tops.

Its when they climb up to the top of the kitchen units it get very annoying, I cannot reach them AT ALL.

Best of luck.