Go to your local craft or home improvement store and find con-tact paper in the color/texture desired. It should cost about $6-$7 a roll.
Search books, magazines or the internet for picture or silhouettes of whatever decal you would like. Print and cut out the image exactly as you want it to appear in decal form.
Tape down your image on all edges to the back of the con-tact paper.
(I found it made the image much more easy to cut out).
Use scissors or a razor to cut your image from the contact paper
Peel away your cut out image and there you have it... A perfect Con-tact cut out of whatever you want to stick on your wall/furniture