[Revisited] Productive Ways to Use Downtime in Your Web Design Business

We've all been there. No client work in the pipeline (or you're waiting on them for something), and scrolling Facebook and watching YouTube are like the sirens of Greek Mythology, luring you in with their beautiful promise of hours on end of entertainment (even though you know it won't end well). How can you use this time to be more PRODUCTIVE in your web design business?