Browning makes a "waist belt" with pockets on both sides / one in the back. I prefer vests or belts with pockets that have 2 pockets within the one...kind of dividing the bigger pocket in half. I only use a waist belt when it gets over 80 degrees. This is the one I use...( 5th row down - 2nd from right )...
http://www.bing.com/images/search?q...t=browning+shell+pouches&FORM=IGRE#backbutton
-------------
I like the Browning clays vest.../ it gets a little too warm in temps over high 70's...but its got room for everything...like this one ....on Browning site.
http://www.browning.com/products/catalog/clothing/detail.asp?fid=A023&cid=305&tid=026C
------------
Extra choke tubes - I carry in a plastic fishing lure box ...they hold 6 chokes / then 2 in the gun ( a pair of Skeet, pair of IC, pair of Mod, 1 Imp Mod, 1 Full ) is typically what I carry.
-----------
Rugged Gear push cart...is a good product / for sporting clays especially ( carry extra shells, rain gear, water, etc....but not for Trap really... unless you're shooting at a facility where you have to park a long ways from the fields ....or they have a lot of fields ...where you have to walk a half mile or something and carry all your gear ...extra shells, etc..
http://ruggedgear.com/
----------
Glasses ...with prescriptions...I go with Decot HyWyd....in a variety of colors..light gold, vermillion, target organge....depends on what your background is and what type of targets they throw ( the lighter orange, bio targets ) are not the same as the old traditional White Flyers...
http://sportglasses.com/
------------
earplugs ....custom fit to your ears / molded ....you can buy a kit from Brownells....but most tournaments will have someone at a booth there making custom fit ear plugs ( they mold them to your ears - you sit for 10 min / they cure for 4 hours ) and then you can use them.
Raidans custom molded ear plugs is the one Brownells carries.
Custom plugs are by far the most comfortable - and the quietest / I don't like ear muffs on my shotguns either ( especially on guns with parallel adjustable combs ) because they bump the comb.