Rodney,

Both these topics (supering and queen excluders) are covered EXTENSIVELY in
the archives.  BEE-L archives are easy to search at:
http://listserv.albany.edu:8080/archives/bee-l.html

Specific answers you will find in the archives to your questions are:

Supering: Some say top, some say bottom.  Recommendation: since it's
foundation not drawn comb, bottom supering is better.

Queen excluders: some swear by them, some swear at them.  It's personal
preference.  If you don't use them, sooner or later you'll end up with brood
in your honey supers and perhaps a queen in your honey house.  Learn to use
them and you'll find them a valuable tool.  Some call them "Honey
Excluders", but I think those who do haven't learned how to use them.

Results may vary, depending on location, season, experience, preference and
hair color.

Aaron Morris - thinking learn your tools!