If you're looking for sneaky tricks to help you win at all cost, look elsewhere. I'm not much of cheese monkey but I know a nasty combo when I see one. Though I seldom get to play I spend a lot of time hypothesizing and generally mentally assembling my forces. It should be noted that I have played 40K for at least ten years.
I have additional rambles concerning tactics I'd hoped to use at the Vancouver 2003 Grand Tournament. You may want to take these with a grain of salt cause I forgot a lot of rules and ended up losing more then I won, but I'll have my revenge...
I've written a lot about tactics for using a Nurgle Chaos Space Marine army in the 3rd Edition of 40K. Unlike some sites out there, my tactics are legal and have been updated to reflect the latest Chaos Codex. All this despite not having time to actually play 40K much, living abroad, and not having my beloved Mac with which to update my webpages.
This page had gotten too large to be easily digested. Perhaps one day I'll write a more succinct page of tactical advice. Despite it's length, or maybe because of it, search engines were directing traffic to this page. So to save bandwidth and to break my ramblings down into smaller chunks, my advice has been split up into pregame, ingame, and post game tactical advice.
I entered and did well in a third large tournament. This was under the fourth edition rules and the now obsolete third chaos codex. None the less I noted down some lessons I learned which might be useful to anyone trying to win a tournament.