Here is a drawing I made of Sitna manor. I am not the best artist, but I find it very helpful to sketch the layout of buildings or towns in which my characters will spend a lot of time. This helps me see how the ideas in my head actually fit on land, or paper, and it helps me when I need to describe how far things are from one another or what sounds, smells, and sights my characters might see as they move from one place to another.
If you are an author, have you ever sketched out a building or town? What other things have you done to help make your storyworld more realistic?