I know a lot of the Vons in SD County are gone now but Vons Just4U is wa-a-a-ay cheaper than Costco for a household of 1-3 people. You have to keep adding things (electronically) to your list every week, and actually start to buy some of them before your Just4U selection gets larger and larger as time goes on. The Just4U prices are dirt cheap and I’m a longtime master at bargain grocery shopping and couponer (which aren’t so plentiful anymore).
Also the AMEX Blue Cash Preferred is the best AMEX card out there.
I’ve only had it for 18 months (closed my Gold Card Acct and opened it) and already got back ~$300 last year (statement credit). It pays 6% back on standalone grocery store purchases and 3% back on standalone gas station purchases. This does NOT include “big box” stores or their gas stations but includes Safeway gas (northern Cal and OOS) and Fry’s gas (Kroger in AZ).
When you combine the Vons Just4U (deep) discounts and pay with the Amex Blue Cash Preferred, your savings are even better than the prices at military commissaries (which I DO visit 2-3 times per year when my youngest kid is present and able to get me in)!