With so many people concerned about saving money on gas, the usefulness of this web site, www.gasbuddy.com, is incomparable. Give them your U.S. zip code or Canadian province, and see a list of the lowest gas prices found in your area. In my Virginia suburb, Costco indeed has the best prices, which is why there is always a crowd at their pumps.
Elsewhere on the web is this list of 18 Tips for Raising Your Fuel Efficiency. Most you may be familiar with, but it serves as a reminder to check your tire pressure! I know loads of people who don’t check this vital sign, who may be using more gas than would be needed otherwise. A good list to have.