The Tibetan Syllable
This diagram, while busy, captures all the key basic points needed to understand basic Tibetan orthography. Visual frameworks help me to hold on to knowledge and I hope it helps someone else as they begin trying to understand classical Tibetan.
The top half of the diagram shows the basic syllable structure of stacked letters. Note that though prefixed letters are silent, the exceptions are listed below. The bottom diagram illustrates sub and superfixed letters and how subfixed letters change the pronunciation of the root letter. Superfixed letters are silent.