Best rewards programs for credit card use?

[Uglyowl]

I have already maxed out my $300 for the year with Citibank Dividend card:

Earn cash back on everything–a full 5% cash back on purchases at supermarkets, drugstores and gas stations, plus 1% on all other purchases§

I know that Chase has an identical item as well. Any other suggestions?

I do not fly either.

Thanks,