Health insurance

I'm certain that I need health insurance, but the stuff is unbelievably expensive that I have found so far and it's not exactly easy to justify $100, $400 or more per month for health insurance when I can't be sure I could even come close to covering that.

Anyone know of a good inexpensive plan? I know I will need insurance, but I'm not sure where to start on finding something that will be good for someone in my situation.