what is the best advice out there for keeping yourself free from stomach problems. what are some good preventative measures and perhaps some home remedies in case one does get hit with stomach problems....i will be traveling in mexico for a little over a week and don't want to ruin my vacation. i have too many family members that have traveled to mexico and have ended up sick for several days, some have even ended up in the hospital...yikes! any extra advice when traveling with children???