Do your Qualtrics surveys end up with an unwieldy number of blocks that contain a lot of duplicated material? Ensuring consistency while generating and maintaining a large number of blocks is not only tedious and time consuming, but also more error prone. If you create one block for each of your treatment conditions, Qualtrics has some handy features that can help avoid needless repetition. In this guide, I’ll outline the best approach that I have found to automatically generate blocks that differ in systematic ways. Using this approach, most factorial survey experiment (also called experimental vignettes) designs can be implemented using just a single block.