Originally Answered: What's a great litter?
I recommend Breeders Choice cat litter. It is 100% recycled paper, dust-free, and I never have a problem with odour or tracking. Other brands of paper litter are fine as well, some come in the form of pellets, which don't track, and some in a looser form; more like small pieces of crumbled/scrunched up paper, which can track a little, but still worth considering. I only mention this one brand because it's the one I use most regularly; I personally find them all to be the most absorbent and dustless which = no mess.
My next best suggestion would be to go with litters made of natural materials, eg corn, rice, wheat, pine, wood chips/shavings offcuts etc. These seem to work quite well regarding odour control, absorbency, and dust reduction; they come in different forms, some pellets, some like a crumble, some like fine little chips; some do track a little, it depends on the size of the litter particles, but they are still worth considering.
I would advise against any kind of clay; clumping, non-clumping, scented or otherwise. While the ordinary clay will work as a short term solution, and the clumping clay is easy to scoop regarding solid and liquid waste, they are so sticky that they track everywhere and the dust from them settles all over the floor and furniture and anything else that is anywhere near the tray. They also smell, no matter how often you clean, because they cannot neutralize the ammonia from the urine and the dust only helps to spread the odour.
Scented clay just stinks, and can drive cats to start leaving nasty surprises around the house because they don't want to use it either. All of the clays leave a sticky muck on the base of the tray which takes a bit to clean off, and always smells bad no matter what cleaning product you use on it. Most of the other litters, especially the paper, leave almost no residue in the tray when it is time to change it all over.
One quick observation; no litter will work properly regarding odour control if both solids and damp litter are not removed daily, and the tray contents should ideally be completely changed over once a week, and the tray thoroughly cleaned out with a mild cleaning product. Sometimes though, I do leave this changeover for another week, and it's still ok. (with paper, anyway).
Sorry this is so loooooooong, I don't want you to have to evict your kitty from the bed over something that is easy-fixed...and if she loves sleeping next to you as much as mine does near me then I thought it worth posting too much information over too little; and I'm sure other posters will have some good tips as well that I've missed...so I hope you find a solution that works ;0)