H.A.
This may be hard for you to consider with your masters degree - and having come as far as you have. But have you thought about waiting tables a few busy nights a week at a nice restaurant? (Someplace that averages at least $20 per person) Waiting tables is fast, easy money if you have the personality for it. I know many Moms that do this for a flexible part-time way to bring in money. One works at a higher end seafood chain - she rarely comes home with under $150 cash for 6 hours of work on Fri/Sat night.
Other side job type ideas -- go through your house and declutter. Sell things on eBay or Craigslist. It will give your house a nice deep cleaning and give you some extra cash.
Is there something you know really well? Could you blog about it? Write articles? You could set up a website, have some affliate links to related products, have adsense adds and try your hand at the wonderful world of making money through internet popularity.
There are also sites that you get paid for writing or reviewing items if your articles/reviews are popular.
You could also get a job with the US census. They are hiring like crazy for extra help taking census. 20-40 hours a week, most of the work is evening and weekend. In our area, depending where you are the rate is 10-17/hr. It just depends what the competitive rate is in your area. You can find out more about their hiring at http://2010.census.gov/2010censusjobs/how-to-apply/local-...
As I mentioned in your other post, I did exactly what you did.. but on purpose. I was making 65k, when I stopped working we lost more then half of our income at the time. I've definitely explored a LOT of ways to bring money in and save money.
You can make it, you just have to get creative and find what works for you.