I'm a lazy programmer, and I'll do everything to make it easier for me in my professional life:

• Clean Code,
• SOLID principles,
• Avoid STUPID principles,
• DRY principles,
• Avoid WET principles,
• Generic classes and functions (I love generics. You can write something just once and forget about it. Also, it's easier to change something in just one place, and don't bother with it anymore),
• Cover letter app, because it's easier to change something in just one place, and don't bother with it anymore (but I think I already said that somewhere)