After struggling for a long time with how I'd make dungeon maps for the West Kingdom campaign, I finally figured out the trick to making dungeon maps with Microsoft Picture It! I've had reasonable success making wilderness maps with the program. But dungeon maps have been problematic. Last night I finally figured out how to do it and here's a sample of the result.
I had tried demos of dungeon-mapping software, but wasn't terribly pleased with them (all a combination of too user-unfriendly, to "flashy," and/or too labor-intensive).
So I tried a multitude of other approaches: hand-drawing, Word tables, Excel sheets, MS Paint, and Picture It! photo editing. No matter what I tried, I was displeased with what I produced. My Picture It! results in particular always ended up looking awkward and "gangly" somehow.
The trick is not to use long corridors. It's that simple. It took me a while to figure this out, but I finally realized that the long corridors were what always, consistently, looked wrong. Just removing them, and placing all (or nearly all) the rooms butted up against each other does the trick. I've even had success now using the "insert shapes" feature to create round, octagonal, and other non-square rooms, and they turn out quite well.
Now I can produce a map that looks nicer than my hand-drawn ones (which frankly are not a pretty sight) in about the same amount of time it takes me to sketch one with pencil and paper. The dense packing of rooms means there are always multiple paths of access to nearly every point on the map, which should promote player planning and avoid architectural railroading. And the dungeons look like they were built by sensible architects who tried to make a reasonably efficient use of space.