Just as exposure to darkness prompts your body to produce melatonin, exposure to light (especially bright light) tells your body to stop making melatonin. Melatonin plays a significant role in regulating your circadian rhythm.
Using light therapy upon awakening can help to shift your circadian rhythm earlier if you time it right. The timing is based on the sleep scheduling and phase advancing component of this treatment approach.
To do this, you will need a bright full-spectrum light source. The lamps you currently have at home probably won't be bright enough. What you need is a lamp that can generate at least 2000 lux. If you experience seasonal depression, you may want to get a 10,000 lux lamp if you don't have one, and those will also work for Delayed Sleep Phase Disorder.
The lamp should be positioned 16 to 24 inches above your eyes (that should be open most of the time), and exposure should be for at least 15-20 minutes but not more than 30. Don't stare directly into the light, but rather let it come down into the lower portion of your retina, at a similar angle to the light coming from the daytime sky. By the way, direct sunlight at noon is about 120,000 lux.
Examples of therapy lamps are below: