Simon Doonan and Fashion Director and Senior VP of Barneys New York Julie Gilhart have paired up to advise us on how to wear Fall's most desirable fashions. One segment preaches that black makes you more intelligent, but this one is more useful because wearing leather can be tricky. We certainly don't want to channel '80s rock stars in the year 2008. We also learn leather is not limited only to jackets; it's translating onto pants, skirts, dresses, jewelry, and vests, so perfecting it is a lot harder than it seems. Watch first, live la vida leather after.