Calling all you charity ride peeps!!!!

What have you found to be the best way to raise money for a charity ride?

I'm riding the MS 150 Escape to the Lake in June and am required to raise $250. A small amount, but so far I've only been able to raise $75. I've posted the donation request a few times on Facebook (that's where I got my $75,) and am thinking about sending a mass email at work.

Just looking for suggestions that I may be able to use to get a boost for the cause!