Your Oven
If you ever start to smell something burning when you turn on your oven, it might be time to give it a deep clean. First, chip off loose pieces from your range, then spritz burnt-on food with ammonia. Sprinkle baking soda and a few drops of white vinegar on the bottom, let it bubble up, then whisk away the grime with a sponge.
Your Carpet
You're going to love this: According to Paul Iskyan, owner of Rug Renovating, less-trafficked areas of your carpet only have to be cleaned once or twice a year, and every 18 months for a bedroom. For higher-traffic areas, the most often you'd need to bring in professionals would be three or four times a year, although once you see that your carpet's dirty, you probably should have it cleaned for health reasons.
Your Tiled Surfaces
Marty Hoffman of Hoffman Brothers Floors suggests cleaning bathroom and kitchen tiles with a cleaner that has "neutral pH" on the label. You can also mix baking soda and water for a homemade cleaner: Pour 1/2 cup baking soda into 2 gallons water and mix very well. Then apply the liquid with a string mop or sponge mop. For grout, use the same baking soda and water mixture, but for tough stains, call in the pros.