Draw. Read. Color. Cook. Movie. Music. Games. Youtube. Facebook. Go for a walk. Go to walmart. Make a bucket lsit. Hang out with friends. If theres snow go build a snowman. If you have a dog play with your dog or any other pet you may have.
Theres endless possabilities of things you can do, just need to find what interests you.
Crank the tunes and rearrange your room. Pretend you're the king of the castle and imagine what you'd do if you were in charge. Do the dishes and mop the floors and (oh, wait, you don't live in my house so I don't really care about that last part, lol). Enjoy the solitude!
It depends if you have any electronics, if you do like internet play games like youtube, facebook, or play wolfgames, if u have television then watch whatevers on and or watch a movie by hooking up an Xbox or something, if you don't have any electronics then play a bored game or play truth or dare, spin the bottle, or prank call.
i like yelling when im home alone..also blow up 5 balloons try to keep them all up in the air at once eventually you should just end up popping them :D do this with loud music and leave the water running