Photo Tip: When your subject is of indeterminate size-a mountain, a body of water, a snowscape-add a sense of scale by including something of known size, such as a person, a car, a tree, or an animal.

Middle-aged man is spurning the fast car for a flash bike. But is this the tip of a fitness iceberg or just a yearning for expensive gear?

"You're supposed to tip the pizza delivery driver like you tip the waiter," says the site. "They rely on tips and use their own car."