So many things have changed since Costco opened its doors in 1983. For one thing, there was no pharmacy. And can you imagine bringing your checkbook?

Want a Costco membership for only $1.67 a month? Find out how Costco's limited-time new membership deal can dramatically cut your membership costs.

Don't miss this deal to buy your own Costco membership and get a $20 gift card, effectively cutting the price to $45 for the year. (I bought one and highly recommend it.)

Thinking about upgrading to a Costco Executive membership? Make sure you know about the possible drawbacks before you do.

Although Costco brings to mind large families and bulk buys, there are plenty of households of one and two out there who save money at Costco. Indeed, Costco can offer a ton of savings opportunities for roommates and couples alike.