If you visit any large city and photograph tall buildings, you quickly understand the problem of perspective. Unless you are about half a mile away (just try that in New York) you have to shoot up and use a wide angle lens to fit it all in. The inevitable result is a building that looks like it's falling backwards. And if you're shooting 2 buildings side by side, it looks like they are going to hug.

What professional photographers don’t tell you is how bad they really are. Even the best of them fail most of the time. Which is to say that the images they show are only a fraction of the images they create. The rest? Just digital debris. So success, ironically, is largely a matter of hiding their mistakes.

It used to be, with film, that there were only two kinds of photos. The Keepers and the Discards. Either a picture was worthy of printing or it wasn’t. The iPhone changed all that. Here’s how to manage your Photos Library and keep it under control.

This is a year of years in so many ways. It's changed the way we live. Changed the way we see the world. And it's changed photography in the process.