If its the proper size, I just trace it onto the washaway interfacing (wash-n-gone, use it all the time on delicate embroidery) ~ you can draw it lightly with a pencil, or washout marker... or the red/blue marking pencils that wash out.
If it needs enlarged/reduced, I go to the library and get it to the right size. I have made a 3-ring binder to hold my "stitch designs" over the last 5 years... makes it great for finding them later. Hope that helps!
If I am going to do a lot of that design, I have traced onto the plastic sheets you can get in the quilting notions dept ~ template sheets ~ and then I've used my Dremel engraver to make the slits... always go over the contours with an Xacto knife to get burrs off, then I can use my Pounce pad for larger areas or bigger areas.