Your campaign looks really solid! I recently did a Kickstarter myself and posted a thread here, maybe some of the responses will help you?
What helped me a lot during my campaign was creating a social media schedule (not only when I wanted to post, but WHAT) and featuring each reward tier. I got quite a few people who liked what they saw in the reward graphics I posted on facebook or twitter and went out and pledged for that. Also being completely shameless and asking my friends to like and share my posts whenever they come across them helped a lot.
It's a month of stress, I know--but don't give up. You're going to get an influx of pledges at the beginning AND the end, so don't feel discouraged if the middle is kind of dry. Just keep pushing and try to edge yourself higher. If you can get yourself at least half funded before the final week, your chances of funding go up to 90%. So keep trucking!
