Leon Wieseltier pens a wonderful meditation on browsing:

Browsing is the opposite of "search." Search is precise, browsing is imprecise. When you search, you find what you were looking for; when you browse, you find what you were not looking for. Search corrects your knowledge, browsing corrects your ignorance. Search narrows, browsing enlarges. It does so by means of accidents, of unexpected adjacencies and improbable associations. On Amazon, by contrast, there are no accidents. Its adjacencies are expected and its associations are probable, because it is programmed for precedents. It takes you to where you have already been—to what you have already bought or thought of buying, and to similar things. It sells similarities. After all, serendipity is a poor business model. But serendipity is how the spirit is renewed; and a record store, like a bookstore, is nothing less than an institution of spiritual renewal.