Controlling the odor before it exits your system is one thing that helps. I take probiotics which combined with the high fiber, low sugar diet seems to help. Others have said Nullo tablets taken daily help reduce odors and well fitting plastic pants can help to contain odors for quite a while.
Just kidding. I'll echo Zeke's comment: pay attention to your diet, and see if taking chlorophyll/copper tablets (Nullo is one brand) works for you. I have tried a few brands and I have a poor reaction to it. They can cause cramping and diarrhea, and that's exactly what happened!
(the other side effect is a bit gross! It turns your poop dark green!)