The second tip is concision, or succinctly stating ideas.

This summary is too succinct; it needs further elaboration to make it understandable.

Professors should explain everything in detail, not be succinct and always tell students to go home and read their books.

The epitaph engraved on the headstone was a meaningful, succinct poem.

Why persist in writing essays if one has not even mastered the art of writing succinct sentences?

To put it succinctly, I don't know, and I don't want to know.