As Pippin said, be sure you have a planner. When you can physically see in your hand how much you have left on your list, you don't feel like it will never end. Also, if you're in school, carry an extra folder with you. Whenever you have homework or something to get signed, put it in one side of the folder (rather than back in your binder). By doing this, when you get home, all you have to do is pull out your folder and complete everything on that side. As you finish, put your work in the opposite side so you can see how much you've done and also so you have quick access to give it to your teacher or turn it in the next day.
As for cleaning and such, try to keep everything off of your floor and tabletops (don't stack books, homework, games,etc) every night. On Saturday's or Sunday's,which ever is more convenient, I recommend going over everything with a damp rag or a cleaner just so everything FEELS and LOOKS better- this will not only make you feel more productive, but it will also encourage you to do more.
