One of the best things about the LEGO community is that we can learn from one another. Here at BrickNerd, we like to share techniques that we see from builders all around the world. . .
Flooring is an often overlooked aspect of a good vignette or diorama. But rather than treating it as an afterthought I think you'll find paying attention to this area adds a lot of punch if it's well integrated. This doesn't mean it has to be super elaborate or a parts hungry nightmare. This technique by N-11 Ordo is a pretty good balance of parts to impact and can be modified to fit a number of genres from space to castle.