6. Over-tweezing Eyebrows
Pencil-thin eyebrows are a terrible idea. Tweezing is fine, but the area tweezed should be moderate and restricted only to shaping the brows to mimic the shape of the eye. Full brows are in style, so there is no reason to reduce size drastically.
Remember that tweezing prevents brows from growing back, so the effect is permanent (even though it takes repeated applications.) That means you need to take extra care in this area.