I know nothing really will stop a direct strike but the more 90 degree turns you can make with you coax before entry the better! lightning doesnt like 90 degree angles, also i bring my coax all the way to the ground with a gas discharge unit at its lowest point then 90 back up to entry,most likely a drop in the bucket but ive never been wiped out. I also have 15 or so ground rods spread every 4 ft connected with stranded bare #6 then i covered it with dirt most of this is for field ground but field ground should be bonded to antenna ground always and is in my case, also bond them to your service ground,i also run my equipment off of battery backup units with avr and really nice surge clamping characteristics UPC and Cyberpower make nice units that stops that third order harmonic feedback wipe out thru your power in case of a strike

well this is just my poormans attempt to protect my equipment

Cheers BTM