Layer the chicken in the crock pot. Top with the salsa, packet of taco seasoning and the water. Cover and set to high for 4 hours, low for 8 hours. The longer this chicken cooks, the easier it is to shred and the longer it soaks in all that seasoning. I've done both ways, I prefer the low for 8 hours.
When it's done, remove the chicken from the crock pot and shred it.
Then put it back into the pot.
Spoon your chicken into flour tortillas or taco shells or whatever you want to use it for. Top with all the fun taco toppings. You can use this meat for almost anything - burritos, put it with the pasta , enchiladas... the possibilities are endless.