Ride in the center of the road as much as possible. Don't use superskinny tires that need to be pumped up to 120 PSI.
I haven't had a flat on my new bike since I bought it 300+ miles ago. I never carry tubes, pumps, or patches.
Bad idea. You
don't want to be that guy, stuck 20 miles away from your house with no local cabs or taxis, and no public transportation. It sucks.