My First Stencil!

[runlotusrun.livejournal.com]

Ok, so Im in the process of doing my own stencil- I chose to use a manila file folder and an Xacto knife. I used clear packaging tape to stiffen up & preserve the stencil. Anything else i need to do/know before i start painting?
Can i just tape down the stencil onto the shirt or should i use some type of sticky spray adhesive?
Thanks so much! Ill be sure to post some pics ASAP ;D