I'm Tired

I've been working since just before 10 this morning, and it's now about quarter to 6. It's Saturday. I wrote more than like 14 pages today already, including reading about 8 cases. I'm tired. I've also revised a letter to opposing counsel that my co-counsel went crazy on (he is more offended by opposing counsel's behavior than he realizes). I'm just tired. Oh, did I mention I was filing electronic documents with the federal court until almost 11:30 last night? No? Yeah, that might have something to do with it too...