1. Dried flowers and potpourri
Potpourri should be ok. Dried flowers may be considered toys if they’re within reach - sticks with dangling things on them are fair game. Keep them on mantles or high tables and you might be ok.
2. Fresh cut flowers in vases
Again, keep them high and out of reach. Cats like gnawing on plants - it’s like salad to them. Oh, and don’t even bother trying to grow an avocado or a ti plant indoors. Research indoor plants - some are toxic to kitties.
3. Yarn
Keep any stringlike thing (thread, yarn, Christmas tinsel, shoelaces) far away from cats. Elastics are bad, too. Cats can eat these things and bung up their intestines. In fact, a friend’s cat died exactly that way - she ate one of his shoelaces and he hadn’t realized it.
4. Bits of fabric for quilting
Should be ok. Will likely be laid on top of. Cats like to ‘help’ you with your projects, which often means sitting on top of them.
5. Shelves that are so full of knick-knacks that no sane creature would try to jump onto them
6. Shelves that are only half filled with knick-knacks
Cats are very agile and they know it. They’ll leap onto, into, and in between things you’d never expect. Or they’ll climb.
7. Robes and other pieces of clothing hanging down from hooks
If they’re not moving in the breeze, they’re probably ok.
8. Paper
Some cats are paper rippers. Others ignore paper. We had one cat who’d let us know she was miffed at us by ripping bits off the newspaper and spitting them out. Occasionally she’d tackle a book. She’s the only one I’ve had that did that.
9. Miniblind cords
If they’re blowing in the wind, kitty might notice and play.
10. Pens and pencils
May be chewed on (the non-pointy end).
Watch out for plastic bags with handles. Cats can get their necks in the hole and get stuck. Same goes for collars - cats can manage to get themselves strangled. I
Oh, and cats love love the taste of bleach so you have to keep it away and any rags with it on also.
Your cat may also climb the Christmas tree or swat the ornaments. It might also (more likely when it’s a kitten) try climbing the curtains. My best friend’s cat was found swinging from the curtains trying to bat at Christmas ornaments. 
They will also scratch the furniture. If you provide a carpeted cat condo, it might use that instead.
They are trainable - you just have to repeat. Don’t hit them - just make a loud noise or speak loudly. My cats were trained to ‘no’ and ‘down’ - usually I’d clap my hands twice to go along with the commands.
If you get a kitten, it will be a rambunctious ball of crazy that can get itself into trouble any number of ways - like an infant, you’ll need to keep an eye on it.
If you can’t stand the idea of cat fur (it’s fine and it travels - no matter how clean you are there will be cat fur on you and your things) and prize your furniture and possessions very highly, well, maybe get an older cat or no cat at all. A friend of mine works at the SPCA and despairs over all the fairly young cats that are turned in all the time. She figures that people decide they’re too much work once they’re not cute fuzzballs anymore 
I recommend two cats if you’re going to be out a lot - cats are not that independent; they like company and if you won’t be it, another cat will.