SOLID DRY KISS UX

SOLID : Single responsibility, Open-closed, Liskov substitution, Interface segregation and Dependency inversion

Create a system that is easy to maintain and extend over a time to time.

DRY : Don't Repeat Yourself

Develop a functionalities that need not to change but can be extend the functionalists. 

KISS : Keep It Simple Stupid

Coding standard must be maintain and approach do simple, so that every developer must be able to understand at one glance.

UX : User Experience