How to: Stalk shoes online

Have you ever seen something you put off buying, only to have it disappear/sell out before you had a chance at it? I've kicked myself more than once for letting the perfect whatever get away, until I realized how easy it is to stalk merchandise* online. Here's my technique: I saw a pair of sturdy-yet-cute sandals on the Urban Outfitters site a few weeks ago. I've been on the lookout for