As my limited experience grows I am seeing these tips as quite on the money. I'm in the Detroit area for recreation right now and doing my first urban/micro caches ever.
As I grow more comfortable with them I find myself guessing at their location while I walk up. I'm even beginning to remember the name of the hider so as to check their 'tricks'.
Things I definitely plan to add to my arsenal: Gloves (a discrete but protective pair), a golf pencil for discrete logging, an item to drop so as to give a reason for stooping (something visible to others around and yet small enough to pocket after the decoy), a dentist's mirror or similarly small reflective device, a minimag flashlight.
Thanks for the help all...I can only hope these things help others.