Before (focal point in dead center):

After (focal point along right vertical third):

Depth of Field
DOF refers to the range of distance that appears sharp. The image below has a somewhat shallow depth of field, which can be helpful in shots where the background is not too interesting or you want to place emphasis on one spot.

Filling the Frame

When a subject fills the majority of the picture, the result is more dynamic. This rule is especially important if the picture will be printed at a small size. I took these photos in Charlotte, and the second one shows details that the first is lacking:

Before (not bad, but check out the next one):

After (filling the frame):

Frame within a Frame
This makes for a creative photo, especially when an interesting subject is inside the frame. The image below was also taken in Charlotte. Notice how you're automatically drawn in.

A photo that contains a dominant color, strong lines, geometric shapes or points should also be a top pick because these components catch the viewer's eye and guide it along the photo.

Oh, and don't forget that overexposed photos are preferred; in fact, the brighter the better! Aim for the look of car headlights blinding your eyes at night. (Couldn't resist this last "tip" in celebration of April Fools' Day!)