Windows: Sharing files with Dropbox is pretty simple, but free utility Dropbox Linker makes it even simpler: Whenever you add a file to your public folder, it will automatically copy its public link to the clipboard for you.
If you've ever shared a file with Dropbox before, you know the drill: Drag it to your public folder, right-click on it, go to Dropbox > Copy Public Link, and share that link with your friends. Sure, that's simple enough, but if you're feeling especially lazy (or you share a lot of files), Dropbox Linker will automatically copy files' public links whenever you drag them to your public folder. Just start up the portable Dropbox Linker utility, enter the path to your Public folder and your Dropbox user ID, and let it run in your system tray. It couldn't be any simpler.
You'll still have to copy links the manual way if you're sharing a file you added, say, a few days ago, but if you're moving files in and out of that folder frequently, this keeps the process pretty effort-free.
Dropbox Linker is a free download for Windows only.