One clipboard rots. That’s all there is to it. You copy one thing, then another, and…you always need the first thing you copied again. Myself, I’ve been using the clipboard manager tool in Alfred (with the PowerPack add-on), but it’s pretty basic. So I’ve picked up ClipBuddy today because it’s free right now—Free Clipboard Manager For Macs: Automatically Organize All of Your Copied Text With an Intuitive Copy & Paste Utility.