Add this stuff:
NEVER: Leave a map you are editting by closing Blockland. You MUST disconnect, or all progress will be lost. It does not matter whether or not you saved.
NEVER: Use .jpeg files! Use .png! Players that connect to the server will not be able to download the .jpeg files!
NEVER: Leave the mission without saving and relighting the scene.
NEVER: Only paint terrain. The terrain file will only overwrite if the terrain has been changed. Just nudge terrain somewhere, relight the scene, save the mission, and disconnect.
WARNING: Painting has no undo! DON'T SCREW UP! Just kidding. But seriously, there's no undo on painting. Pain in the butt, right?
I've had bad experience with all of these.
Also, I'm glad to see that you've become an experienced map maker.
Oh, and I use "Set Height" all of the time! It's good for going "F- this. I'm trying again" or quickly lowering vast amounts of land.
Also, explain the differences in use a soft and hard brush. Some people may not know.