Night Drives

Surprisingly not illegal! Set up a tripod on the passenger seat, get the focus and exposure right - then click away! Bumps in the road translate into blurs, but the result is a pretty unique effect and a perspective you don't normally see.

Depth of Field

A lens with a very shallow depth of field (such as one of my favorites, the Canon 50mm f1.8) allows you to achieve some great focal blur. These shots are simply pieces of paper over a black background.