People who are doing their first steps with the NXT kit sometimes find it hard to move from traditional LEGO "studded" building to the "studless" way of building you are performing with the NXT kit (or more generally speaking, with TECHNICS parts).
Admittedly, it has some learning curve, but in my opinion, it's worth the effort: the models are much more robust and stable (which certainly is a requirement for robots and, as far as I know, was one of the major reasons why LEGO decided to switch to studless design), it allows for more different angles of the parts, you can bridge larger spaces with less parts (putting one brick on another just to span some room was sometimes pretty tedious, wasn't it?), and once you are used to it, according to my experience studless building is much more effective than the ole' school way.
Brian Davis now hinted me to a great idea: if you are in search of samples for studless building techniques, why not use the immense treasure at peeron.com where LEGO has kindly put complete instruction scans of thousands of official models - in particular the scans for the TECHNICS ones might serve as great tutorials.
Thanks, Brian, for bringing that to mind (in the NXT STEP forum - another proof that it's very worthwhile to visit it)!