In this day and age I don't see this as a bad thing. It's possibly one of the things you should do because of the current economy. Either way, having a plan for the 'just in case' is always a good thing.
I would like to think I have a very good plan.
If I happen to loose my current job I would start out with setting up for unemployment. If I am truly lucky it will cover all my bills until I can find a new job. At the most it would help me with my car payments.The car being my more important thing to worry about. Second would be old credit card bills that won't go away.
Which would lead to the next item on my list which would be to call my credit card companies and explain what's going on and if they could lower my interest rate. Actuly, I should do that anyhow.
Go back to school full time. Possibly go to an advanced speed school that can assist me with getting school loans. I would probably not be able to be on unemployment at the time. If I plan right I could probably get enugh from the loans to pay off the rest of my car and a few bills. A good dream to have.
Then would come the job hunt of insanity. Since I would have free time I would be able to go to a hiring agency and attempt to gain employment through them. With an open schedule I would be able to get to their interviews as well as accept temp to hire and contract positions. Both of which I am currently not comfortable with taking while I have a full time job.
I could look into moving to a new city. This would be a very, very interesting thing to try. I would only be able to try the cities that I have friends and family living in right now, but that gives me some pretty good options. California, NYC, Michigan, Iowa and Connecticut. If I can afford to drive to the locations that would also help me out.
This could also force me to go out and sell my jewelry to people I have never met. Going into salons and such to try and get them to either purchase it or get a good commission for it. At the very least I could make more postings to Etsy per day and look into shows and the like.
At the most extream I could ask my parents to take up part of my car payment and use the older car. That would be desperation on my part. But after that? I have no idea what I would be able to do to get on with my life.