How much should I inflate my tires?
My general rule of thumb is 10-15% lower than the posted maximum for normal road riding. Higher if you're carrying a load or are a larger rider, lower if you're a lighter rider. There's an article in Bicycle Quarterly that's a pretty good guide on tire pressure for road riding depending on weight and width of tire.

http://www.vintagebicyclepress.com/images/TireDrop.pdf