I used to be a huge fan of Starbucks, but over the past few years I’ve ended up being a much less frequent customer. I used to love the vibe of the place but now, not so much.

One thing that’s often worked for me is when I’m in the store, picking up one of the iTunes freebie cards. For the uninitiated, next to where you pick your drinks up they have a stack of credit card-sized cards with an iTunes redemption code on the back for either an app, a TV programme, or a music download.

By way of an...