Great actors embody the character they’re playing to such an extent that they become the character.

In Nine, Daniel Day-Lewis fully transformed into his character, even living as him between shoots. He wouldn’t even respond to the name Daniel during the project.

If you want to become a new, better version of yourself, start by thinking deeply about who this person is. What are their habits? How do they think and behave? What do they want? Imagine all the details vividly. Then, embody this new version of yourself and start living as them.