Imagine getting exercise and raising money for charity -- you can with the free app Charity Miles. When you download the app, you select a charity of your choice (like the World Wildlife Fund or Habitat for Humanity) and a corporate sponsor pledges money for every mile you work out. It's all synced to your smartphone, so you can't cheat your workout miles.  All you do is hit start and then work out. When you're done, you hit stop, and the app tallies up your donation. Over time, your "sweat equity" can help do a lot of good.

When pumping gas, save money and maximize fuel by doing one thing: Hold the gas pump correctly. When you hold the gas trigger all the way down, it is the fastest way to fuel up your car. But it also creates the largest amount of gas vapors, which means the fuel going into your gas tank becomes vapor and then it's returned back into the underground storage tank at the station. You end up with less fuel, still paying the same price. To maximize your fuel efficiency, pump gas at a slower speed to minimize vapors and waste.

When it comes to shopping for waxed paper to use in the kitchen, not all of it is the same. The typical waxed paper is just that: bleached paper covered in a thin coat of paraffin-based wax. Paraffin is petroleum-based, which means it does a great job at repelling moisture, but it isn't easily biodegradable. New eco-friendly brands in the marketplace not only offer unbleached waxed paper, but soybean wax-based, too. That means there's no petroleum in the product. The best part? It makes the waxed paper compostable, too.