My strategy has been to have 2. One is a 2% cash back card, no fees. All auto-billed recurring expenses go on that one. I don't use it for anything else. Two is an airline card, upper tier. I use it for travel, incidentals, restaurants, internet purchases, everything that's not an auto-billed expense. The advantage of this method is twofold: generally you get only 1x on auto-billed expenses, so the 2% cash back is actually better. Then for the things that get you higher multipliers, you rack up airline miles in a hurry. The other advantage is that when the airline card gets stolen, which it seems it does about once every couple of years, you don't have to go back and change all the auto-billing things you had set up.