How can I achieve the best results when slow cooking a tri tip in the oven?

To achieve the best results when slow cooking a tri tip in the oven, sear the meat first to lock in juices, season it well, cook it at a low temperature (around 250F), and use a meat thermometer to ensure it reaches the desired doneness (usually around 135-140F for medium-rare). Let it rest before slicing to allow the juices to redistribute.