Post # 20 of the thread,
http://forum.tvfool.com/showthread.php?t=901 summarizes the basic steps of grounding the mast and coax.
If you need to add a ground rod, be sure that the antenna ground system is bonded to the existing ground system that serves your electrical service. Bonding provides a reliable connection between the two parts of the grounding system, so that they will not have large voltage differences if there is a fault.
I own a DB4e, its an excellent UHF antenna. Try what you already own first.