Get most rewards from your Credit Card

It is off topic, but a part of financial planning.

I have a Citi Dividend Platinum Select Credit Card, it offers generous cash back (5% on drug store, grocery store and gas station, and 1% everything else). Great card, no annual fees and no complicated tiered structure. Only a little problem now, as its reward is capped at $300 each year - that's the reason I did a quick research today, and find a few other good deals and share with all.

1. Chase Cash Reward Visa Card
- 5% cash rebate on gas, grocery store, and drug store, 1% everything else.
- No annual fee.
- also has $300 cash rebate cap.
(this is almost same deal as Citi Dividend).

2. American Express Blue Cash
- For first $6500 spending, 1% return on everyday purchase, 0.5% on everything else.
- For $6500 - $50000 spending, 5% return on everyday purchase, 1.5% on everything else.

*. Everyday purchse includes: drugstore, supermarket, gas station.

3. If you travel/eat out a lot, American Express Costco is a good choice, it offers 3% cash back for eating out, 2% for travelling (hotel, ticket, car rental), and 1% for others. You need to pay $45 Costco annual fee to get the card for free. Online application via AE website doesn't offer the same deal, I got the form via Costco membership.