Much as we like to post how we beat the system like that thread about talking our way out of a speeding ticket, the law's still the law. If you're speeding, be prepared for the consequences if you're caught and own up to your offense.
If they pulled you over for going maybe 2-3 mph faster than the posted speed limit, then you may have a case. But, 25 mph is normally inside a residential area and is a zone particularly important to cops. 11 mph over? Even I won't go past 30 mph in a 25 mph zone.
Also, there's a lesson to be learned in having the registration and proof of insurance immediately handy. I keep mine in one of those plastic document holders that normally comes with the car. I make sure the important numbers and expiration dates show clearly.
One time, we got stopped at a checkpoint on the lookout for drunk college kids, one weekend. I immediately showed my stuff. The cop, seeing everything is neat, organized, and in order, let us go ahead of the other cars who came before us.