Ben Blease takes a look at some basic hard surface modeling techniques, using the built in Blender Toolset, focusing why it is imperative to keep your meshes clean.

In this tutorial I will cover some of the basic hard surface modelling techniques using built in Blender tools

Ben also shows how to use primitives in a technique which shows how to model angles accurately. Check out the tutorial for Using Hard Surface Modeling Techniques in Blender here.