I once learned an important lesson from a seasoned photographer. He asked whether if I usually produce vertical or horizontal shots. Since I didn't know what the purpose of his question was at that time, I just answered that I shoot most of the time horizontally since that's how you can handle the camera the easiest. He gave a sly smile. I later learned why.

Vertical shots get published on the cover of magazines, which gives you more monies, while horizontal shots automatically fall in the inside pages only. So now, I'm shooting food and landscape on the vertical angle more than ever.