I figured with all the arguing always going on here, it might be good to put up a post like this. Zonal Marking is basically a website based on soccer/football tactics, reviewing games and tactical aspects/concepts of teams, coaches, countries, you name it. This was really the site that got me hooked on tactics and I find it pretty fascinating. If you want to learn more about tactics or fancy a good read about a good game, this is probably your site: http://www.zonalmarking.net/