When I was shooting primarily 35mm, I didn't typically opt to shoot 12 exposure rolls of film, thinking that "This way, if the processor loses or ruins a roll, I've only lost 12 pictures, and not 36." But hey, to each his own.
True, but for critical, non-repeatable jobs I always shot more than one roll and took the film to the lab in 2 or more batches so that if there was a line failure not all of the job would be lost.
Two 2GB sandisks
Peace be upon you 

