There are tons of videos for both research an how to apply it, youtube ftw.
Some things you should NEVER do ,like in this video 3:20 minutes in,cutting the clearbra on a car is a sure sign your in the wrong place,most professional installers have a machine that cuts the patterns to the correct size, more then one person n the forums have had there paint cut by bad installers.
YouTube - Applying Clear Paint Protection Film by DECALFX.COM
Razor blades an paint don't mix well .