Question: To apply vinyl lettering to a interior wall,
Option 0: place the lettering, with the plastic still attached, against the wall.  Use a spatula to firmly pull the lettering off the wall.  Gently peel the plastic off and ensure the lettering sticks.
Option 1: place the lettering, with the plastic still attached, against the wall.  Use a spatula to firmly press the lettering onto the wall.  Gently peel the plastic off and ensure the lettering sticks.
Answer: 1