Don't be afraid to work your brush into the eyeshadows.  The shadows and brush were made to work together, so applying firm pressure is ideal. 

Use the small precision point as a liner brush for your top and bottom lashes. It also works great to add a pop of highlight in the inner corners of the eyes.  

The brush is an amazing tool to use dry (without product) after the eyeshadows have been applied onto the eyelids with fingers.  It fits perfectly into the crease and with a few windshield wiper strokes, it will diffuse any harsh lines.