What is the best way to check what credit cards you have?

[Xanthia Alysha]

over the years I opened and closed credit cards. I only want to have 2-3 credit accounts. But I am not interested in having mroe then that. Lately I found out that at some point I opened a Sears card to get a discount in Sears for something. I compeltely forgot about it and I had to call and cancel it.
Any recommendations on how to check what credit accounts are still opened?