I pump my tires up to 110 every other day, or just before any major all-day ride. my glueless-patch covered tubes seem to lose about 5-10 psi per day.

pumping up everyday/every other day tends to prevent pinch flats. and if you have a floor pump, it takes all of 30 seconds to top both wheels off -- 2-3 pumps -- so it's much less than a hassle than it sounds to keep this regimen. But then again, if you dont ride every day, it would be somewhat pointless.