Programming Don'ts

Just don't.

1. Blurring of concerns
2. Tight coupling
3. Overly long functions
4. Changing the value of a property
5. Changing the value of a variable
6. State
7. Input/output
8. Inheritance
9. Constructors
10. Objects
11. Three-valued logic
12. Nulls
13. Loops
14. Conditionals