Sometimes easier said than done!
When you have a cat who is misbehaving, it's really hard to "keep calm". 
No matter what your kitty peril is, this site is likely to have information that will help you live more peacefully with your cat.
Check out the podcasts on Cat Talk Radio.
The Blog section has bountiful resources.
And if you don't find what you're looking for, email Molly and ask.