One choice is to either relax and enjoy the useful guidance of modern tech, or don't leave a thick trail of crumbs. Accenture Strategy's Tom Jacobson notes that the more you search for an item, the more likely sellers will pick up your scent. If you're really "just browsing," don't put an item in your basket. And be aware that the ability to snoop keeps improving as sellers, using Artificial Intelligence, work to connect the dots, get a bigger picture of who you are, what you want and need.