| Comments | They are not always updated |
| Decoupled business logic | Abstraction, concretions, layers and dependencies |
| Final Classes | Composition over inheritance |
| Functions | They should be small |
| Git Mastering | The best software version control |
| IDE | Know your IDE |
| Immutability | It makes the code more predictable |
| Meaningful Names | It should tell you why it exists and what it does |
| Minimum Scope | For your variables, methods, and classes |
| Performance Tips | Use strict comparison |
| Strict Types | Use strict_types constant when possible |
| Static Analysis | Identify bugs in your code |
| Testing | Test what your software does |