I did this when I first got my machine. I took two scraps and put w&n between them and started from the beginning and went through to the end. I cannot tell you how often I use this "sampler"!!! The actual stitch is very different from the styalized symbol and I can get the "feel" for what will work best. Some stitches don't work well with batting and that was important information to gain, but I found if I went more slowly the stitch designs would come out well even done in a sandwich. The few times I don't consult this sampler it is because I'm going back to a favorite stitch and don't need to "see" it again. It is one of the most useful things I've ever done for myself.
Be sure to do it in the order of the stitches on your read-out and be sure to number them completely for ease of access. You'll be glad you did this! A real time saver!!! There must be a couple of hundred stitches!