Oh man, I am the queen of being let go. Usually it's because a contract has ended, but usually it's because management doesn't like me and I was there in a temp job so they didn't need to have a reason to get rid of me. Things to keep in mind:
-Short placement? (or two week job?) no problem. Less time wasted. Get back out there and look for something with less bullshit.
-You don't actually want to work for dicks that would do this to you anyway. Just sayin'.
-You will naturally want to have the last word, go back, argue, and have them see the error of their ways. This will never happen. Just move along, hun.
-Look at what you did and didn't like about the entire environment. With every place that I've either walked out of or gotten the boot from, I've still learned something. Fired because I didn't file enough every day? I should work somewhere that lets me have control over records management. (their records system was utter s**t, and every time I tried to make something better I got brushed off.) Hate being glued to a front desk? Reception is probably not something I should be aiming for then. Happiest making spreadsheets? Look at data analysis instead. Things like that.
-On a related note, were there problems that you saw come up again and again? Do you think you could create something that could be sold to solve this problem? Some of the best quality apps and services came about because some people got together and, rather than trying to re-invent the wheel just thought "Man, [insert current thing that I do] sucks. I'm going to make one that isn't s**t."
-Believe you will have something better, because you will. Seriously, two weeks isn't even enough time to really build yourself up onto your job with. Something else will come along, and it will last, and it will be something you are proud to call yourself. Law of averages, my friend.
This is my "I just got fired" song until my bling business actually gets going:
http://www.youtube.com/watch?v=0_xCLngEOSY'Cause with no 9-5, it's a brand new day....