>>7465589My best tip would be looking a lot at Flickr, find creators you like and look through their photos, look at what groups they post their photos in and find new builders to look at. Figure out how they make their builds and what tricks they use.
Aside from that, build a lot. Make a new LDD file and tell yourself to build a new car each day. There's no real magic trick to it, so just getting familiar with the domain you want to build in as you develop new building techniques is valuable.
Here's a simple picture showing how you can make a 6 wide car that fits two minifigures, as shown in
>>7465560 There's another method which uses plates instead of doors too, but it's a bit more complicated. Benefit of it is that you can expand your palette a lot.
