Hook n' Look Splash Episode #24—I will show you how to tie a "Double Uni" knot. The Double Uni Knot is my preferred method for joining braided line to a fluorocarbon leader. On this presentation I used 10# Seaguar Kanzen Braided line joined to an 8# Seaguar Fluorocarbon leader.
Illustrated Version on Seaguar: http://seaguar.com/seaguar-community/double-uni-knot.htm
More "Splash" Informational videos: http://www.hooknlook.com/Splash