How do you make a map?

I'm curious how everyone here goes about making maps. do you make the triggers first, maybe the units, or do you make a map before you really have any clue what its gonna be?

Lay out what you plan to do then map what you feel it should be then add what ever is needed triggs, units to where you want. Or do units and terrain as you go. Triggers are usually always last.

I work on the units first. I like to build a lot of custom units in my maps and I typically try to stick to a particular theme.

Type/Plot -> Terrain&Doodads -> Regions -> Units -> Sounds -> Triggers -> Online play test -> Fix bugs -> Publish map