The narrow International Moth designs are much easier to sail with some foam or an airbag in the outer wing pockets. There is a fine line between too much and too little. Too much will make the boat want to turn turtle immediately when you capsize. Too little will be of no benefit. Don't be concerned about the hardcore scoffing at you, all of the top sailors utilise some form of buoyancy in their wings. It makes the boats much easier to control in a breeze, especially when you are trying to keep you speed down prior to a start.
Another good idea is to have a piece of elastic on your tiller so that it is self-centering. Do not fit this too tight, just enough so that you feel a light resistance at five degrees of helm or so.
Ideally, you should have trampolines that are porous, not pure sailcloth ones. This depends on the windstrength where you sail and your bodyweight, but is nonetheless a good idea. Solid sailcloth trampolines are a pain in strong winds if you capsize, as most sailors do! The wing that is out of the water acts as a sail and the wing in the water will act as a sea anchor. This can make it especially difficult to get enough leverage to right your boat in strong winds, even if you weigh more than 11 stone.
Another tip to make your capsize recovery as quick as possible is to have righting ropes under your wing bars so that you can lean back from the wing bar whilst you are standing on the centreboard to give you some extra leverage. Use a piece of ski rope with some elastic threaded through the middle, this will stay tidy and above the water when you are once again upright.