Cats mark their territory by scratching, spraying, urine, dropings.

When your cat scratches stuff they're doing more than filing down their claws. They're leaving their scent.
 Cats have scent glands on the pads of their feet, and scratching things is another way cats mark territory.

Cats leave their scent by scratching, peeing, spraying, leaving droppings, rubbing. All kittens and cats have scent glands on their cheeks, paws, flanks so  when they do this stuff against anything such a door, furniture, carpet, chair, and so forth, when they do these things even when they do it to you..they are putting their own personal scent on the objects.  
Spraying is when a cat backs up to a vertical surface with their tail erect and squirts make liquids or urine. Their tail quivers with shakes as they're spraying both these liquids.

Regular urinating is when they squat to pee, wether on the furniture, the floor, things lying on the floor or any other horizontal surfaces. Cats mark for territory and also for mating. The best solution to stop spraying is to get yours neutered or spayed by five months of age, no later then 13 months of age. Once a cat is in the behavior of marking no matter the type of marking it becomes an un-fixed behavior and the chances of re-correcting this behavior is very low, because now this is now a "fixed behavior" for the cat.

 It is important to catch them and correct them while they are younger, and to always be ready to catch any bad behaviors before they become "fixed behaviors in the kitten/cat".

 Neutering,  on the other hand, solves just about most marking issues with the spraying issues. Furthermore, the longer you wait to get your cat or kitten fixed the greater the risk that the spraying behavior will be ingrained. 

Bad behaviors:

Most people play with cats by moving their had or an object wether covered by a blanket or not,  just to watch them bounce on it. That might have been cute when the pet was a new born kitten.. but never so much with an adult cat who bares much larger teeth and sharper claws...with this set behavior.

 It’s best not to encourage this kind aggressive behavior when the cat is a kitten, because it makes the cat/kitten turn agressive. But even if you do this with your kitten or your cat, well you're stuck with it because you helped create it!  

There are ways to teach cats and it is most important to teach them the younger they are. Getting in the windows, on the counter tops, on the table, on or in the dresser & the closet & cabinets, trash cans, bags, and all the other extra stuff both cats and especially kitten love getting into. There is always a way to train a kitten and a cat. 

 If clapping your hands and saying NO doesn't work, then it's time to go buy a spray bottle and fill it up with some water. WATER ONLY. Everytime the kitten or cat is having bad or un-wanted behavior spray the cat or kitten once and say; NO! If the kitten or cat responds well to this method...well, then go back to clapping your hands while saying NO! 

For some cats they get the clue and will stop when you clap your hands and say NO when they see the spray bottle. If your cat or kitten stops listening during this training method, spray the cat or kitten as many times as needed, for the bad behaviors to stop. Most cats or kittens don't like getting wet, so spraying them with water is safe and effective. 

Remember training any kind of animal always takes time, dedication, responsibility, and a consistency. You're cat or kitten is no different. 

1. Buy and fill a new spray bottle with plain water only.
2.  It is important to purchase a brand new spray bottle to use for spray bottle training to assure safety.
3. Wait for your cat or kitten to do something he/she shouldn't be doing.
4. Spray water at your cat. 
5. Try not to let your cat or kitten see that you are spraying him/her. But if he/she catches you at times, don't worry about it. Just try to let the cat or kitten think all you're doing is clapping and saying NO! 

People often assume that cats are untrainable, but that is not true! 

 Cats and kittens are highly intelligent animals and can easily be taught a variety of behaviors, even tricks. Begin training your kitten as soon as you bring him home, in order to give him the best chance of fitting in with your family. Here are five foundational training steps to take with your kitten.

You can teach you kitten/cat to sit, stay, dance, use the toilet that you use, and more. 

People also offten make the mistakes of playing with their kitten/cat with their hands, and not cat toys. This is a bad idea as it teaches the kitten/cat to victimise human hands of all ages. when a cat owner roughhouses with her kitten, the kitten learns that it’s OK to play with their teeth and claws on the owner’s skin, which easily escalates into harder bites and scaes and scratches all become harder harder. This is why it is important to use cat toys to interact with your cat. A feather on a string, a ball or a catnip toys, will be as enjoyable to your cat as your hands.