Rising gas prices are a concern for many people as the cost of filling the gas tank takes a larger portion of household income. Extreme commuters (those who commute more than 90 minutes a day) and independent truckers are being squeezed the most. As an example, if a car averages 25 miles per gallon, every 25-cent increase in gas prices translates into a dollar a day more to refill the gas tank. For everyone who drives to work, and especially extreme commuters, the increased cost of buying gas adds up quickly.

What to do? Transportation experts all agree that the way to save the most money on gasoline is to keep your car off the road. No other step will save you as much money. For some workers with computer-based jobs and supportive employers, telecommuting may be an option. For others, it might be helpful to start or join a carpool, even one or two days a week, or contact organizations (in some parts of the country) that provide ride matching services. If public transportation is available to get to work, reconsider the cost of driving versus taking a bus or train.

There are also the old standbys such as keeping your tires properly inflated, avoiding sudden stops and starts, coasting your car downhill where you can, and not hauling around a lot of heavy stuff you do not need right away. Experts suggest filling your tank when it is about half empty and in the morning rather than after a long drive home from work because of evaporating gas fumes.

If all else fails, try to earmark occasional "windfalls," such as tax refunds, for increased gas costs. Consider buying gas gift cards and loading them with cash to use when money is tight. The last thing you want to do is start charging gasoline on a credit card and make minimum payments. Things can get out of control quickly. For example, a $3,000 balance will take 14 years to repay and cost $2,625 in interest ($5,625 total) if minimum payments of 3% of the outstanding balance are made.

We would like your feedback on this Personal Finance Frequently Asked Question.