Grafixman,
Soquili's method is the right one to use with Blender.
The image attached shows how it is done with a cube (1). With vertices of the face you want to remain "flat", extrude (key E) with size (key S) right confirming the extrusion. Make it a small one (2). Assuming you use subsurf to round the corners (3), you get a nice flatten face (4)
If you want to ask specific Blender questions, you can also go to Elysiun. In the forums section, select Blender General...
danifou
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