I used to like using the measurement tools of Part WB, they aren't bad.
But my favourite is the measurement module of Manipulator WB.
If you combine it with WorkFeature WB to put vertices everywhere you're in pretty good shape.
Something I have not yet tried is the tool (forgot the name) that populates all vertices in the part mesh. That would emulate I think the behavior found in other CAD softwares where if your mouse flies over near the center of an edge or center of mass of a face a vertex appears that you can grab onto.