Get gaffer's tape and foam paper. Look in the craft supply area of Hobby Lobby or Michaels to find the foam paper, and if you have friends at the local theatre (plays not movies) you can often get a bit of Gaffers tape at no charge. Else, check with a camera shop that carries lighting supplies.
Step 2: Step 2
Place the gaffer's tape smoothly along the short end of the foam paper.
Step 3: Step 3
Make a tube out of the foam paper, butt the ends of the foam paper together firmly for a nice even join.
Step 4: Step 4
Put it on your speedlite and call it a snoot! The snoot should fit snugly on the end of the speedlite.
Step 5: Enjoy!
You'll be able to get a nice narrow light pattern, customizable by squeezing the snoot.