When I travel on business, I like to do so for cheap. For example, instead of taking a taxi to my hotel, I prefer to take a shuttle if at all possible. It's much cheaper that way, and I don't want to create unnecessary expenses for my employer. I also take cheap flights, even if this means getting up at ungodly hours of the morning.
To be sure, this is less comfortable than picky a cushy flight or a taxi cab. Still, I just can't justify spending an extra $200 or so without any really good reason.
That's not to say that I won't ever spend the extra money. Recently, for example, I picked a decent hotel over one that had a reputation for being a bit of a rat trap. Why? Quite simply, it was a question of safety.
I hope that my employer appreciates how I'm trying to save them some money.