For kitten proofing...
Remove everything off of shelves (unless you like broken things). Store anything that can be ripped such as books, paper, foam. Scour everywhere for stuff like rubber bands, twist ties, paper clips, staples, pens, etc. And safely store them. If you have anything that can be snuck into (bed, dresser, etc.) make sure she can get OUT safely, otherwise, pull those things away from the wall to allow easier access.
For electronics the easiest would be to store them when you're not there and unplug everything else. But if you're worried about chewing (and since some things shouldn't or can't be unplugged) you can insert the cords into PVC pipe or those electronic cord protector things you can buy at home improvement stores.
If you have an area rug it might be a good idea to store that until she gets older as well. My Pica cat, Sugar, chews on the foam protector for my bedroom area rug (as well as the downstairs rug, it's ratty so it has a lot of strings). Anything that generates heat (space heater) should be turned off or placed in a place the cat can't touch it. Registers should be safely secured and if you don't have a grate for the hole, covered securely. If you have curtains with strings, those strings should be hidden. Curtains that are fabric may be ripped by enthusiastic play so looping them around the rod could be a good solution.
Um... I'm trying to think of other things in a bedroom but am coming up blank...
Generally, for kittens, the idea is anything you don't want destroyed, don't leave out. :p
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