I have largely been working only on sets since exiting my dark ages, but a contest over on Toys N Bricks got me interested in trying my hand at a MOC. The challenge: build a micro-scale modular that would fit in with the official Mini-modular line.
On the build itself, I started by using Lego Digital Designer (LDD), a great little program that's free on LEGO.com. This was the first time I had used the program, but I was pleasantly surprised at how easy it was to figure out. My only complaint about LDD is that it's very difficult to pull a parts list for your design. That was a bit of a pain when it came time to inventory the parts I needed and order what I was missing.
The inside of the building was built up using trans blocks once I reached the window levels. This was intended to at least let some natural light filter through to make the windows shine. If I had a light brick, I might have attempted to use that to give that "lit up" effect. Instead, I just set up a small LED flashlight behind the building and took a picture that way.
I think the final product turned out about how I imagined it from the start. I was pleased with the build, even if others offered some very creative and detailed entries of their own.