Making delicious skirt steak tacos is easy if you follow these simple steps:

1. Marinate the Steak: In a bowl, combine olive oil, chili powder, cumin, garlic powder, salt, and pepper. Rub this mixture over the skirt steak and let it marinate for at least 15 minutes.

2. Preheat the Grill: Preheat your grill or skillet over medium-high heat.

3. Cook the Steak: Place the marinated skirt steak on the grill. Cook for about 4-5 minutes on each side for medium-rare, or until your desired doneness is reached.

4. Rest and Slice: Remove the steak from the heat and let it rest for 5-10 minutes. Afterwards, slice it against the grain into thin strips.

5. Warm the Tortillas: Lightly warm the tortillas on the grill or stovetop for about 30 seconds on each side until soft and pliable.

6. Assemble the Tacos: Take each warm tortilla and fill it with sliced skirt steak, diced onion, and chopped cilantro. Squeeze fresh lime juice over the top for added flavor. Add guacamole or salsa, if desired.

Following these steps will ensure that your delicious skirt steak tacos turn out perfectly every time.