Don't wash your hair everyday. Washing your hair everyday not only decreases hair color life, but dries out your precious ends.
Try only washing your hair once or twice a week.
DO NOT LATHER! By lathering all your hair around your head is going to cause your extensions to tangle, and possibly knot.
Make sure to not go to sleep with you hair wet. And make sure to brush out your hair.
Before going to bed try braiding your hair into two braids. This will prevent your extensions from getting tangled
You want to avoid swimming too much in pools because the chlorine will dry out the hair.
Tight top knots will put tension through the body of the hair, and break it.
Too much heat from styling tools on the hair.