My wife has the Citi Dividend. I have the new Chase Cash Plus Rewards.
Both are 5% on gas/groceries but capped at $300.
We typically get around $40 back a month on those items. Easy money.
I put airline tickets on Citi Premier Pass and everything else on Amex SPG.
I just applied for the Citi Professional card. 3% cash back on restaurants and office supplies. Yet one more card I'll have to carry