level your horizon

Whenever you’re photographing a scene that has horizontal lines in it (such as a landscape, a building, or a product on a tabletop), take a second while you’re looking through the viewfinder to make sure that you’re holding your camera straight. By double checking that your lines are level before you take the picture you’ll save yourself a lot of work later trying to straighten things out – plus you’ll end up with a much more pleasing image.