Another good tip is making sure that the endlinks are perpendicular (at 90 degree angle) or close to it while looking at it from the front/rear of the car AND the sides. You can achieve this by adjusting the length of the endlink until it is perpendicular from the side and using the spacers provided in the kits (for getting the front/rear view perpendicular).

One last thing, make sure that you clock the ends of the endlink so that the endlink can have the most movement. The test would be to twist your endlink after you tighten the ends of the endlink and see if you can twist it freely.