If your work travel involves more driving than flying, Amex Blue Cash Preferred Card may be right for you.

You'll earn 3% cash back on gas, which is huge considering that most rewards cards only offer 1% or 2% back.

And if you like to fill up the trunk with snacks for the road, you'll get double that when buying groceries. Just make sure you stock up at regular supermarkets -- big-box stores like Costco or Walmart don't get the 6% cash back treatment.

But if you travel abroad, consider using a card that doesn't charge a foreign transaction fee on those trips, advises McQuay at Cardhub. Why pay another 2.7% when you don't have to?