Cook and season the ground beef; grill and slice the chicken.
Warm the taco shells according to package instructions.
On a large serving board or tray, arrange all the components in groups: beef, chicken, shells, lettuce, tomatoes, cheese, etc.
Place sauces like sour cream, guacamole, and salsa in small bowls.
Add lime wedges and jalapeño slices for garnish.
Let everyone build their own tacos and enjoy!