To maximize points use:
Amex Platinum for Travel
Amex Gold for Restaurants and Groceries
Amex Preferred or Everyday card for everything else.
I see why people get these AMEX cards... in one vacation I been to two lounges ($100), complimentary check bags & seat upgrades ($320), Global Entry ($100), and had access to restaurants that had no reservations for 2 weeks until I said what about for an AMEX Reserve customers...