One more thing: I think I was first to use T-pieces and Technic pins for a "Back to the Future" hover function on a small scale LEGO car. I used it for the first time on my 5-wide DeLorean Time Machine: http://www.mocpages.com/moc.php/314222 Permalink
Quoting Matthias H
I have an idea, but I have not posted it yet. I will post it soon:
Using minifig heads as wheel hubcaps/rims instead of regular ones. I will post it soon.
Oh, ok. But be sure to post it 'cause I can't really figure out how without looking! I once made a Bugatti veyron and the backlights were made of minifig heads. But the thing I told you, I don't get the patent. Yours will if you add your creation.
Use of slopes rather than tiles/plates to get a steeper transition into the water: http://www.mocpages.com/moc.php/354793 (actually there's another technique here that I think is new, the way I attached the bush to the palm tree, but I don't have any pictures of that...)