For many years, Chris authored a popular series on AutoCAD fundamentals named "TIPniques". It was published in the monthly email HotNews newsletter sent out by AUGI, the world's largest CAD & BIM user community.    

While AutoCAD has matured vastly over the last years, these fundamentals can still apply and help users understand, not just use, AutoCAD. So, rather than let them die, buried in the cloud somewhere, I've reposted them here.