From http://www.meowsandhowls.com/katetiquette.html

Katetiquette:

Rules of Etiquette  for Inexperienced Kats
Author Unknown

If you have an upset stomach, get into a chair quickly. If you cannot
manage this in time; get to an Oriental rug. Or, shag is good.

 For sitting on laps or burring against trouser legs, select colors that
contrast with your own.

Always accompany guests to the bathroom. It is not necessary to do
anything. Just sit and stare.

 Do not allow closed doors in any room. To get one open, stand on hind legs
and hammer with forepaws. Once the door is opened for you, it is not
necessary to use it. You can change your mind. When you have ordered an
outside door opened, stand half in and half out and think about several
things. This is particularly important during very cold weather or mosquito
season.

Determine quickly which guest hates cats. Sit on that lap during the
evening. He won't dare push you off, and will even call you "nice kitty". If
you can arrange to have cat food on your breath, so much the better.

If one person is busy and the other is idle, sit with the busy one. For
book readers, get in close under the chin, unless you can lie across the
book itself.

For ladies knitting, curl quietly into lap and pretend to doze. Then reach
out and slap knitting needles sharply. This is what she calls dropped
stitch. She will try to distract you. Ignore it.

For people doing homework, sit on the paper being worked on. After being
removed for the second time, push anything movable off the table - pens,
pencils, stamps - one at a time.

Get enough sleep during the daytime so that you are fresh for playing
between 2 and 4 a.m.