Recently MoneywiseMoms.com posted a great article about using vinegar and water as a household cleaner. To do this, just mix equal amounts of water and vinegar in a spray bottle, and voila -- you have a high-quality household cleaning spray.
If you're not to keen on the strong vinegar aroma, you could always add your favorite fragrant essential oil. The cleaning spray I have right now has some lavender essential oil, so I'm most likely going to ad that when I make my own. Citrus essential oils would also be just as good.
The best thing about this idea is that it's cheap but also environmentally friendly. You don't need to worry about what kind of chemicals you are spraying all over your house, and if you purchase a reusable spray bottle, you're also saving on plastic. Any grocery store will sell large containers of vinegar for cheap, so you don't have to buy vinegar as often as you would a regular household cleaner.