Step 1: Gather your materials.
1. A blank screen. You can either make your own out of an old picture frame and some fabric from a fabric store, or just buy a blank one at an art store. I'd tell you how to make one, but this is about the printing itself.
2. A picture of something you'd like on a shirt. The easier to trace and cut out, the less hassle you've got to go through when you place it on the shirt, or, you could just draw it directly onto the contact paper.
3. An x-acto knife, or any other hobby type of knife.
4. A sharpie marker, to trace your picture or to draw on the contact paper.
5. A roll of contact paper. This is what you'll be tracing or drawing said picture on to.
6. A screen printing ink of your choice. Also, if you'd like, you can use those weird tulip slick paints. Not the glitter kind, those will screw your screen up.
7. An ink squeegee.
8. I also get a sheet of news paper to put between the shirt layers.
9. A shirt or whatever else you'd like to print on. I've done shoes, handbags, hats, and other stuff. For those non-shirt items, that's where the paintbrush comes into play. It's awfully hard to use a big screen on weird shaped objects.