Damn, this thread is not only sticking to the target, but all offering many great alternatives.
I personally kept rasing my 3 day trial price, and still haven't seen less people signup for the trials (which is basically telling me to get rid of them). It's at $9.99 right now. I was thinking of raising it to $14.99 for the 3 days, and only popping it as they leave, but I'm kinda leaning towards the 2 months for the price of one idea.