Don't ride over glass? I know, sometimes it's unavoidable.

I actually ran over quite a bit of glass accidentally a couple times recently (most of the pieces were pretty small). I got a couple small knicks in the tread but no punctures thankfully. I am riding on Continental Ultra Race tires 700x23 with kevlar. In fact, I've had no flats with these tires yet in the few hundred miles I've ridden them. I keep them inflated to 120psi and check the pressure before every ride.

I have Continental GP4000 on my other road bike and I have about 700-800 miles on them (including a century ride) with no flats to report. I also run those at 120psi.