Sleep. How much do you need? How much do you get?

[ibelieveinmrreeves]

We've got one who will scratch the door and another who will just make a noise outside it. Will take Jayos tip on the water spray though, we used that with some success a little while ago to keep them off of kitchen counters/dining table so that may work.

[The Grim Reaper]

Or you could just kick the cats out at night like everyone else.

[Honkytonk]

Put the cat in a bin, I find that helps.

[4D]

Whatever time I go to bed I seem to wake up around 5am, even at weekends  My ageing bones seem to make the decision now, not like in my youth when I could sleep for 12 hours