Here's my situation.
I have four major bank cards: AMEX BCP ( $30,000), Discover IT ($15,000), Chase Freedom Mastercard ($56,500), and BP Visa ($7500).
AMEX BCP gets used for groceries, everywhere else where they take it, and gas (only when the Discover and Freedom don't have quarterly 5% gas promotions).
Discover IT only gets used for quarterly promotions.
Chase Freedom is my regular backup for AMEX, plus I use it for quarterly promotions.
BP Visa was picked up when they first came up with this card, and I use it rarely, because it only pays 2.25% on BP gas, up to 20 gallons (My car has a 15 gallon tank). However, it is a VISA with a decent limit, so I am keeping it. Plus, you can redeem the next day at the pump, whatever you earn.
I use mainly Shell and BP gas. I drive about 35 gallons monthly. I am in the Shell "Fuel Rewards Network."
I do not want new cards.
What is the best combo for me? What should I carry? What should I leave at home (I do want to maximize my rewards)? How does BP Visa fit in (or does it)?
How many of these should I carry?
Biggest expense: groceries about $6000 annually, and gas (but I am retiring at year-end, so will drive less).
Sorry for the length !!