Make a Habit Out of Learning
You are always learning. Life is a classroom.
You can choose to learn the lessons life presents you, or not.
More than this, you can choose to learn specific knowledge and skills.
What interests you? Learn about that.
Keep your brain active, flexible, growing and learning. Make a habit out of this. Otherwise, it will atrophy, like a muscle.
You may even find that learning is fun. Especially when learning about things that interest you.
What do you want to learn about?