Look at the reed, first off, and notice how one side is flat and the other side has an incline and a type of bump. Put the reed into the reed guard thinnest side first and flat slide. At first it seems as if you might crush the reed or chip it, but the bump on the other side will stop it from doing that. And there you go, you put a clarinet reed into a reed guard. :)
Your bottom lip should be about halfway through. It depends what type of reed but usually it is about halfway through the reed.
Sully Reed goes by Sully Reed.
Reed Apostol goes by The Ninja.
Howie Reed went by Diz.
Jozella Reed goes by JoDazzle.
Tanoai Reed goes by Toa.
Cheri Reed goes by Scout.
Antonio Reed goes by Tonio.
Matthieux Reed goes by Redeux.
Courtney Reed goes by Budgie, and Coco.
JR Reed goes by J.R., and Lee.