How much did I learn today?

"When you are in 20s, your learning curve should be so high," writes Raja Reddy Poreddy. "Learn a lot every day. Make sure you write a diary of what you have learned each day."

This daily habit is a good one to hold on to, even as you progress into your 30s and beyond. Your goal should be to learn something new every day, so that your view of the world is constantly changing.