Have to give full props to Scott Cameron for this site. It's been around for as long as I remember, and if you're looking for a tutorial or are stuck on a lightwave 3d project, then check it out. Nicely laid out into categories, and updated regularly, there are hundreds of tutorials to be found here.
Probably the No.1 CG Artist forum out there. If your an artist 3d/2d or otherwise and you need advice, news, or just want to check out some awe inspiring art pieces from artist all over the world, then click on the link.
Apart from being the official site to order your copy of Lightwave, it has a great forum, and some very helpful tutorials for the newbcomers and advanced users a like.