To achieve a straight hair mid taper fade haircut, start by creating a baseline with a trimmer, then gradually transition from a longer guard on the clipper to shorter guards as you move upwards, utilizing the lever on your clippers to smoothly blend the fade, ensuring the taper starts around the mid-section of the head, not too high or too low; remember to use the corners of the blade for precise blending and finish with a clean line-up around the ears and hairline.