Name after content.
Name as generally as possible without risking being false.
Name within the smallest context.
When using external tools, use their names.
Use two characters: thing ➡ th.
Uppercase global ones: TH.
Collision is case sensitive: th and TH do not collide.
Pluralize by adding one underscore: things ➡ th_.
Use one uppercase for matrices: Distance matrix ➡ D.
Differentiate ones with the same content type by numbering: number 1 n1 and number 2 n2.
Differentiate ones with different content types by shifting: mean me and median ed.
Updates parts: update! or update.
Gets parts without modification: ge or get_something.
Returns booleans: is_something.
Returns new data structures: make or make_something.
Returns texts: text.
Returns paths: path.
Reads: rea.
Writes: writ.
Keyword arguments: ke_.
Differentiate by removing a character: write and writ.