In a bowl, toss the sirloin steak tips with Worcestershire sauce, garlic powder, salt, and pepper. Cover and set aside for 20 minutes to marinate.
In a skillet, heat olive oil at medium-high heat. Add sirloin steak tips and cook until desired temperature. I cooked mine for 1 minute on each side until a little crust formed (~4 minutes). Transfer to a plate and let them rest while you make the salad.
In a large bowl, add olive oil, balsamic vinegar, salt, and pepper. Add arugula, cucumbers, and avocado. Toss to coat. Divide the steak into two plates and serve with salad. Enjoy!