NEW YORK (CNNMoney.com) - Today's Tips is all about you, as we answer your questions. You can send us your questions at 5 tips@cnn.com.

1. I was hoping to get some advice about lodging expenses. What's the best way to avoid spending too much cash?

- Charles in Alabama.

ANSWER: Tourist season is well underway, so look for business hotels if you want to score some deals. During the summer there are more family vacations and fewer business conferences. Check the financial district for some of those hotels, says Anne Banas of Smartertravel.com

Get some money back on your gas bill! Some hotels and inns are giving consumers gas rebates of up to $30 to $50. Check out Hotels.com. Keep in mind that to get the rebate, you'll have to book through their site.

Another helpful site is bedandbreakfast.com. You can go directly to the b and b's to get your rebate, and remember, there's always room for negotiation.

2. What are the best ways to make efficient use of gasoline engines and mileage?

- Jay, New York

ANSWER: Get a tune up. You can avoid fuel economy problems because of worn spark plugs, dragging brakes or low transmission fluid.

And believe it or not, the most significant way to save gas is...you! Driving the speed limit can save you 12 percent on your gas bill. And if you curb your appetite for aggressive driving, you can save up to 37 percent, according to Edmunds.com. That means braking more gently, not revving your engine and taking it nice and easy when the light turns green.

3. I'd like to see tips on improving your credit score.

- Karen from Michigan

ANSWER: The key to improving your credit score is paying your bills on time. It makes sense to automate your bills online. This way, you have no choice but to pay on time. Plus, you won't run the risk of late fees and you'll save on postage.

If you have to get rid of some of those credit cards, make sure you don't nix the oldest one you have. You'll have a better credit score if you can show a long credit history.

4. Why don't [rebate companies] send [rebates] to post office boxes?

- Mark from New York

ANSWER: According to the largest rebate company, it's to prevent fraud. Some fraud rings use multiple PO boxes to get around the "one per limit" rule.