Writing on the bus

Has anyone managed to find a way to write Gregg legibly in a moving vehicle? It may seem like a weird question, but I commute by bus to and from class (40-60 minutes one way) so a lot of my notes are done en route. Gregg works fine until we go over a hill, a bump, a rough road... i.e. a lot of the time I have to rewrite outlines over two or three times :P

Is there some Gregg solution or another system that someone's found for this? I was eyeing alphabetic systems, but the majority seem to suffer from inconsistencies in logic... maybe there's some holy grail of shorthand systems that can take inconsistent proportions and still be legible?

Thanks :)

(by erik for everyone)