waiting for the train

It's 3am. I'm staying up all night to catch a train to Paris (Not quite as romantic as it sounds, but it's still pretty cool in principle) as I didn't want to disturb this evening's roommates. The tube shuts down at midnight, so I'll need to wander through buses to get to the station. I still don't know how to use Paris public transit, but I'm sure it will be easy enough once I'm there. After a week of running around frantically through London, I'm hoping to be able to have more of a laid-back experience for the next few days. I will look forward to sleep...and also Paris. Let me know if there are any recommendations for getting around, etc. Also let me know if there is any wackiness happening.