I start on one task, only to find out that it's blocked, waiting for an e-mail from someone about a license key. I start on another task, only to find that someone else actually had started on it and forgotten to mark that they had claimed it. I start on ANOTHER task, and the interoffice network goes down, removing the server I need.
I'm exhausted even though I don't feel like I've done anything, and I want to go hooooome! Maybe I can just take a nap at my desk?