Originally Posted by
nerd
For meals, I tip about the same 15% as I would if paying cash. (Frequently, they seem surprised.)
For the room, usually about $10/night for good service, at the end of the trip.
Same here (except I do it at the beginning of the trip...mostly to try and get rooms for the family near each other.)
Other opinions:
http://www.on-track-on-line.com/amthints-people.shtml