Find a "Notary Public" listed in the Yellow Pages...or go to your bank, there is probably one there...or go to The UPS Store (formerly Mail Boxes, Etc), there is usually one there. Or again, just look in the Yellow Pages for one. They will verify your identification and then "notarize" by their seal and signature that you in fact are who you say you are.
It's really not that complicated.
*edit* (I see others beat me to the post...but the info is the same. They are at most banks or other locations that can be easily found in the Yellow Pages.)