Is there anything I can do to prevent snakebites (pinch flats)? Riding in an urban setting, I've lost two tubes in the last week to snakebites, and it's easily the most common way for me to get a flat. I've got Gatorskin treads, which help prevent standard punctures, but don't seem to do much (read: anything) for snakebites. Wheel set is extremely similar to the Mavic Ellipse, i.e., very thin. Other than avoiding potholes/curbs/edges*, is there anything that I can do to cut down on this?

Some more information for those interested:


Wheel set is the Mavic Ellipse, whoops - previous owner removed all identifying labels, probably as a theft deterrent. Here's the only tag left on the tire:  





Tubes are 700x23, sometimes I cram a 700x25 in there  
I inflate "until it feels good," usually ~110/115 psi, tire feels hard and there's no give if I push on it, usually bounces almost as high as the height I drop it from  
Rider weight ~190lbs


*Yesterday I got bit by a patch of gravel. Seriously.   

Also, no chance in hell I'm trading these rims out. They cost more than a month's rent.

Update: Yesterday's ride home

So when I left work yesterday, I pumped my tires up to 145 psi as suggested by @freiheit, and it's embarrassingly obvious that I have not been putting enough air in my tires (as in, "holy crap, this is awesome, why didn't somebody tell me this sooner?"). The ride was a little bouncier, but my acceleration and top speed were significantly increased.   

That being said, I still got a flat about mile 7. Good news, it wasn't a snakebite, so that's nice for a change. Got home, put a new tube in and tried pumping to 150 psi, and the tire blew up*, and it failed suspiciously near the first flat. I didn't find anything in the tread (glass/nails/whatever) or any glaring defects/breaches, but the tread is pretty old and worn out at this point, so I ordered a new one. This of course, was before @amcnabb pointed out that those tires are slightly larger than the max recommended tire size for the wheelset.

I'll update this once I get my new tire, but it looks like not enough air + old tire might have been the source of my troubles.

*Especially embarrassing living in Watertown, MA, where my neighbors are pretty suspicious of loud noises right now. I got a few dirty looks.
Inflate your tires to a higher pressure. Use a pump with a pressure gauge instead of going by "feel". Check the pressure more often. The max pressure listed on the sidewall is a good starting point, but if you're already inflating to max psi, you may want to exceed it a bit.

It's likely you have a slow leak, and you're at a low inflation pressure by the time you get the snakebite. Check the tires and rims very thoroughly for sharp bits, and use water submersion to check the tube for leaks, including the valve. A fresh tube wouldn't hurt.

If your roadside inflation is with CO2 cartridges, be aware that CO2 leaks out faster, so you'll need to top off with air the next few days.

You may want to seriously consider buying a second wheelset with wider rims for urban riding with wider tires, and keep the narrow rims and tires for races and weekend rides.