My whole family has extremely thick hair.. i hate it.
Anyway:
-BRUSH BRUSH BRUSH BRUSH BRUSH
-Wash hair everyday, thick hair gets oily quicker.
-If you wear ponytails, buy the thickest, strongest hair bands you can find. My sister busts a lot of hers because she has so much hair.
(-btw dont let hair go down drains or go in the floor or go in the laudry; i hate it when i find my sisters hair in my clothes or in the carpet x: so clean out your brush over the trashcan)