Don't think darkness
Don't think gore
Don't think evil people knocking at your door
Don't think storms
Don't think noise
Don't think of snakes ready in poise
Don't think crazies
Don't think killers
Don't think of dentists with handfuls of fillers
Don't think pain
or scream or cry, or crash or bang or rip
Don't ever think of these awful things if your sitting alone in a tent.

Angelic Warrior

http://www.poemhunter.com/poem/don-t-think/