This may sound a bit sarcastic, but I do not mean it to be so, but I always build my helicopters (as I do my Airplanes) by following the instructions that they come with.

They usually come with adequate instructions to get them built properly.

But more important then with airplanes is the set-up and flight trimming. If you are a newbie to helis, then just as in airplanes, but even more important in helis, is to find an instructer who can insure it is set-up properly and to flight trim it.