I finally got a Costco membership. I was going to take a commenter's suggestion about just getting a household card on my mom's membership, but after reading the fine print it does say that proof of living there would be asked for. Then, last week as we were walking past the membership desk on our way out I heard the employee say to a lady - "we'll need to verify she lives with you for a household card". So, that nixed that idea.
I ordered my membership via a MyPoints offer. I got 550 MyPoints and also a coupon booklet came with the membership certificate. Free case of Kirkland water, free 48 pack of Kirkland AA batteries and a free Rotisserie chicken! Plus some other $ off coupons that I may use a few of. Of course this certificate came in the mail the day AFTER I had to go to Costco to pick up DH's med's! But while we had been there waiting for his medication we walked around again to kill time and saw 2 things we knew we'd be buying. The guys use the blue shop paper towels and they had a 10 pack for $12.00. Usually I can get them for $2 each so that was a great deal. DD saw a box of 16 cans of tennis balls for $30.
Not knowing if these items are offered regularly (I doubt it with the tennis balls) we went back Sunday afternoon to get these and our free items. It wasn't as crowded as I figured it would be and I did notice gas is quite a bit cheaper there, so I can start using that too to save. I'll just be going once a month when I pick up DH's meds, and have a small list of things I see I can get cheaper. Too bad they don't carry our dog food brand.
I'm not really tempted by too much there - the large sizes/quantities don't always appeal to me as I don't have a lot of room to store it, so I think I'll be pretty safe to not overspend there.