Do you guys know the reasoning behind the BRAT diet? It's actually really interesting. Besides being bland and low in fiber, the pectin in the apple sauce (or juice, if you go that way) can help stop diarrhea.
Another good food to add in if you aren't having nausea with the diarrhea is bananas. The potassium and starch in that can help stop the flow, so to speak, and it can make you feel better too.
And of course, you absolutely have to remember to keep hydrated. Even if you don't feel like drinking anything, just try to suck on some ice cubes or sip on some water, because your body will really suffer if you don't. This is also a big part of the diarrhea diet for toddlers and children as well, especially since they're bodies are smaller and more susceptible to dehydration.
And finally, try to keep your electrolyte balance up too. Non sugary sports drinks are good for this, as are bananas. Just make sure you don't get the ones that are purportedly sports drinks but are really just sodas.