Learn how to make a stencil. They have a bunch of rad stencils you can print and cut out with ease. Stencil Punks is your answer. They have over 1000 free stencils that can be used for silk screening, spray painting or cutting out and taping somewhere. You can use whatever you want on the site, as long as you promise not to sell what you made for a profit.
Learn how to create and use your stencils! :