I asked GrymThor--who has appeared in a few of these posts--if he had any building tips to pass on. Grym's builds are often focussed on staircases, which means they're a nice mix of practical (stairs go up!) and pretty (they're all swirly). Stairs are tricky things: I often overlook their placement when building my protective hovel, and have at least once created a building with two floors but with no way of passing between them. Leaving them to the last minute means I usually build cramped boxes with random stairs and corridors, and that's not something I want to invite someone over to see.
Grym's take is that stairs are the most vital part, often defining what he builds and where he builds it. He uses the following techniques to wrap around trees, but you can also use these tips to make towers, turrets, and more.
Grym sez: "Once a foundation plan has been, set it's best to ALWAYS place pillars FIRST, and get into the habit of using them. Especially when doing the type of stairs I do. After I have placed a floor, I always check to see if I need to place pillars first before I place the block and ramps. The following are good for placement at a single tree for a single tree house."
Single Circle Staircase
Single Square Staircase
The following are good for placement between two trees for dual tree houses
Double Circle Staircase
Double Square Staircase
You can build other things with these tips. The rollercoaster in the main image was made using these techniques, so there's plenty of scope in building more interesting things. Or, like me, you can stick to the creepy two room shack that smells of chicken feathers and sadness.
If you do build something using Grym's tutorials, be sure to let me know what you made.