3 pounds pork shoulder
2 (1 ounce) packages taco seasoning mix
chili powder to taste
crushed red pepper to taste

Place pork shoulder in a slow cooker with taco seasoning. If desired, add chili powder and/or red pepper flakes. Add water until meat is covered. Place lid on pot and cook on low for 8 hours. Remove pork shoulder from pot and shred.
Note: Serve with warm tortillas and your choice of garnishes, such as: lettuce, grated cheese, chopped onions, guacamole, salsa, sour cream, and olives.