Learn the Template Method Design Pattern, when to use and how to implement it.
Learn the Singleton Design Pattern, when to use and how to implement it.
Learn the Facade Design Pattern, when to use and how to implement it.
Learn the Command Design Pattern, when to use and how to implement it.
Learn the Decorator Design Pattern, when to use and how to implement it.
Learn the Observer Design Pattern, when to use and how to implement it.
Learn the Builder Design Pattern, when to use and how to implement it.
Learn the Adapter Design Pattern, when to use and how to implement it.
Learn the Factory pattern, when you should use it and how to implement it.
Learn the Factory Method pattern, when you should use it and how to implement it.