I don't see why you should keep the laundry room doors closed or drains covered, unless maybe you end up having a curious kitten and have a large drain without a grate over it somewhere in your house.
More important to me in the world of cat-proofing your house is
1. A trash can WITH A LID that your cat can't easily tip over
2. Until your kitten is big enough to climb out of the toilet if he/she falls in, leave the lid down
3. Removing as many dangly things (cords, wires, ceiling decorations, etc) as far from their access as possible.
4. Obviously, keep all dangerous cleaning chemicals out of their reach.
Other than that, I can't really think of anything that could harm a kitten. I'm thinking that chances are you'll be around enough to watch it and make sure it doesn't get into anything TOO harmful.
Now... do you plan on getting just one cat, or two? A cat from a shelter, or a breeder? A kitten or an adult cat? All of these things have to be considered carefully, as they all create different situations.

If you're planning on getting a kitten, I recommend getting two, preferably from the same litter (although this is not an absolute, it just makes the transition to your new home easier. Really, any two kittens will do as long as they're roughly the same age). They usually grow up much easier, as they have another kitten with whom to express all their energy. They can become destructive if they don't have an outlet for their energy -- think like a puppy tearing apart things in your house. Kittens can do that too.

Generally speaking, the closer a cat is in age to its companion, the better it they will get along.
If you're getting an adult cat, I recommend asking the shelter or breeder whether or not they get along with other cats. Cats ARE generally social creatures, and most of them enjoy (or at least tolerate) another cat in the house, but there are the few out there who need to be an only cat.
Good luck, and welcome to the wonderful world of cat ownership!! Please keep posting, we all love answering questions.


