Mornings, arguably, are most useful for people with jobs and those with bladder control issues. But we can now add "those looking to lose weight" to that list. A recent study from Northwestern University found that people exposed to bright light in the morning had a lower body mass index than those exposed to light later in the day. Researchers believe morning light may help synchronize the body's internal clock, increasing metabolism and biological efficiency. So set that alarm and face east. You'll practically feel your pants falling down.