How to Write like an Architect
In a 2.5 minute video Kung Fu architect Doug Patt demonstrates how to become a skilled letterer. Actually, he admits in all honesty that "hand lettering takes years of practice to get good." (Via raketenblog)
There are a number of architect-style hand printed typefaces available as digital fonts, for example Blueprint, Enviro, Graphite, the all caps Kandt, ITC Stylus and the Adobe classic Tekton. A real classic is of course Frank Lloyd Wright's Eaglefeather.