Extra Time.

TV Danielle Sepulveres was Juliana Margolis's stand in on The Good Wife for five seasons. She writes for The Atlantic about how a temporary job became full time employment:

"I didn’t expect to do more than that (the hours on that movie set were long and involved a lot of sitting and waiting around), but when another “real” job offer fell through at the last minute, I signed up—in a fit of frustration—for an account on an industry casting site. It was temporary, I told myself. It would be the equivalent of an aspiring actress holding down a waitressing job, except in reverse. Rather then waiting tables in between scrambling off to auditions, I’d be wandering around in the background of 30 Rock episodes. Or playing a haughty party guest mingling at a Gossip Girl socialite shindig. Or dressed up as a Prohibition-era lady of the night and sitting on a gangster’s lap on Boardwalk Empire. (These are all things I ended up doing.)"

I had no idea that getting a SAG card was this involved.