One thing I've found with internet fora, regardless of the subject is that they have to be quite eclectic regardless of the main topic. By covering a wide range of issues e.g. different models/usage/subjects in order to attract interest in the first place.
They then have to have a very tolerant membership and set of moderators. LZ may seem to have a crusty, intolerant bunch of members at times who don't suffer fools, but at its heart there are a very genuine bunch of people who are generous with both their knowledge and time.
Thirdly, the interest base can't be too specific. There are Land Rover forums out there which concentrate on particular models/4x4 activity/interest. But unless you want to know why the 9 rivets on the rear door quarter panel on a 110 TD5 are painted on the nearside, but unpainted on the offside, they're not much use on a daily basis.
Fourthly - humour. Unless the atmosphere within the forum has the facility for members to laugh at itself, to chide others, and occasionally go OTT, you might as well use Wikipedia for your answers.
Fifthly. The buzz. I can't put my finger on this, but there are many Land Rover forums out there. Some purport to be official clubs/forum but if the memberships are dismissive of others (apart from Gaylanders of course), because your vehicle has coil and not cart springs, even though their membership criteria states otherwise, then people will go away.
Sixthly. An easy to understand lay out. when I first got interested in Land Rovers for the second time in my life (about 6 years ago) I joined a number of Land Rover forums (well the free ones). At that time there were 2 forums which were head and shoulders above the others in terms of interest and popularity. LZ was one. The other equally popular one went through a change of layout and involvement of its very influential sponsor/site owner. Despite many protests about the changes, about difficulty in finding items, the site stuck with the new format. Today that forum is but a shadow of its predecessor and no longer gives LZ a run for its money.
Put all those 6 factors together and you have a chance of success because what a forum needs most is high volumes of postings. After all, if I have an MOT on Saturday and want to know how to adjust the parking brake (which I don't by the way) then where do I ask the question? On the
Land Rover Series IIa rivet counters and aligned screwheads forum, (membership 175, all of whom will have had their cocoa by 9.00 pm) or
LZ (membership
n'000s). Both will probably give me the right answer, but the former will take 15 days, LZ will deliver in 15 minutes (or 15 nanoseconds if James Martin is online and 30 nanoseconds for a different reply from Wammers

.
I suppose finally you can't have a good forum without mentioning the tireless contribution of moderators. Some forums have moderators who give up their time selflessly, rule with a sense of benign dictatorship, and are only too willing to roll up their sleeves not being afraid of hard work. (not always necessary for success though - look at LZ).
