Anti-sieze is about the only thing you can do although one does need to be careful that the plug is not over-torqued as it will act as a lubricant on the threads.
FYI - My current set of plugs has been in there for 125k miles. Just tested them recently and resistance looked good on all of them. I used Beru's as that what it came with from the factory. I've never tested them to see if they are stuck since I put them in nor did I anti-seize them. I might anti-sieze them next time they come out. I can't personally see testing to see if they are stuck as long as they are working.....is increasing the risk factor and asking for trouble with nothing to be gained IMO.
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Terry Allison
N. Calif. & Boca Chica, Panama
09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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