I am a huge fan of olive oil, but too much of a good thing can be bad, and I often go overboard with how much olive oil I use while cooking. In light of this, one of my favorite healthy kitchen tools is the Misto Olive Oil Sprayer ($9.95).
All you do is fill the sprayer with olive oil. Pump the cap to pressurize. Then spray on anything your little heart desires. A couple of spritzes will do just fine. You'll end up using less oil, which ultimately means fewer calories, all while still benefiting from its good fats (monounsaturated fats).
The sprayer is non-aerosol, which means it's not harmful to the environment. Plus, you can refill the sprayer and reuse again and again.