Any fool can write code that a computer can understand. Good programmers write code that humans can understand.

Martin Fowler

Entities must not be multiplied beyond necessity.
Occam's razor

Techniques that make good code look good and bad code look bad are more useful than techniques that make all code look good.
Steve McConnell, Code Complete, Second Edition

Most good programmers need to think twice to understand expressions with side effects. Let them use their brain cells to understand the larger questions of how your code works rather than the syntactic details of a specific expression.

Steve McConnell, Code Complete, Second Edition

Goto labels should be leftaligned in all caps and should include the programmer's name, home phone number, and credit card number.

Abdul Nizar