You'll need just a couple of special supplies: a design (of course), an embroidery hoop (found at craft and fabric stores), hand embroidery thread, fabric or embroiderable item, and a way to transfer your design.
How you decide to get your design on your fabric can vary greatly. There are numerous ways of transferring a design to fabric. Most of these methods can be found in your neighborhood craft or sewing store.
I bought the run-of-the-mill “fabric transfer paper”
for my design. Easy to find at Michael's. Other options are iron on paper, transfer pens, dress-makers carbon, etc. The things to keep in mind when transferring your design are:
1) whether it’s going to be on light or dark fabric, and
2) if you need to mirror the design or not.
Also check to make sure your transfer method isn’t permanent, unless you don’t care if the design marks stay on your fabric.