You definitely should not just put meat in a boiling pot of water. You need to add either stock, bullion and some veggies (always onions) and seasoning to taste and once it starts boiling turn it to simmer for hours. A crock pot is the easiest way to accomplish this. I make a yummy pulled pork with just the meat, a can of coke, a whole onion sliced thin, so it melts away while cooking, some crushed garlic and salt and pepper to taste, throw it in the crock pot and in 4-6 hours its done.