How can I stop my cat scratching at doors / carpet in the middle of the night or jumping around our bedroom and generally being a pain in the arse.

To clarify, we've moved from a house where we could lock her downstairs of an evening to a house where this can't be done. She has a catflap, access to her food a warm bed and I leave the TV on the PussyStation channel all night but nothing seems to deter her from either waking us up or clawing at our little girls room and subsequently waking her up..

Ideas please ? either sensible or not..