People tend to check in during these times:
When riding the Capital Metro train, get on the car in the rear. It's not as loud as the front where the horns are.
Free wifi on the train!! :-)
Ignore Dr Whom's tip - he's an idiot. The CapMetro rail is great: on time, clean, easy, cheap, and running on the weekends now.
I'm with Cory; MetroRail is grrrrrereat!
It's a good idea to always have a few single bills in your bag as backup. Sometimes the terminals don't accept credit cards.
If you miss the train heading downtown in the morning, the busses to the Capital or UT are a good back up.