I've changed the way I shop over the past few years. And although the shift has been subtle, I've found that I'm much happier with the things I buy.
In the past, my approach to shopping was simple. If I wanted a new thneed, I would go to a store (or, with the advent of the internet, a website) and choose from the available thneeds. I'd look at the store's selection (or the website's selection) and pick the one best suited for me.
If the thneed I wanted was particularly expensive or important, I might expand my search to multiple stores or multiple websites. But usually, I stuck with the first store I visited.