Self-documenting code

• Prefer good names to // comments

Well named variables

• Say exactly what you are doing (not how)
• Very_long_names_are_better_than_vagueness

Small well-named functions

• Only do ONE thing in each function
• Single-line functions are fine!

Named constants instead of magic numbers.

Constants: 

ALL_UPPER_SNAKE_CASE

Non-const Variables and Functions:

lowerCamelCase

lower_snake_case

duditiousMix_units

Arduino Libraries:

mostlyLowerCamelCase

ButTheOddExceptions: Serial, String, a few others