I have a tie...
Last year my favorite tip of the year was such a DOOOZY that it bears mentioning again: Hu put me (and some others) onto Lock Ease in the bore before shooting. In terms of reducing copper fouling and making clean up easier, I'm still amazed at what a terrrrrrrrific(!!) suggestion that was! So, thanks again Hu!!
For 2006, it is a toss up between my new DI MXX-123 digital scale and a close runner up has been Danzac (aka tungsten disulphide or WS2.) Danzac has been everything moly was supposed to be, without all the "issues" I've experienced with moly.
But, for sure, the DI scale has really put a fine edge on my load development. I mean with it I discovered my Harrell ES (with N133, Varget, and some others that are considered "fine") to be over .6 gn. When one is trying to distinguish between perfomance of load groups with powder charges that are supposed to be only .2 gn apart, one can see the level of ambigeuity is over 100%!! (can we say "worthless" boys n girls??). I damn well can assure myself that if I want .2 gn steps between loads, I can be assured they will be to w/in .02 gn. Now I don't have to wonder about powder charge if I get a flier (and I do get less of them now too!)
My 2 cents!
P.