I'm moving to the US in October, and I won't have a SSN for awhile so no credit cards for me until I get one and build up some credit. What I'm looking for is ways to gain points without using one. In Canada I know I can get Aeroplan points while gassing up at Esso, and there are some deals when buying groceries at Sobeys. Are there grocery chains and gas stations in the US that give out points or miles? Anything else I should be signing up for?

Thank you!