The Seven Habits of Highly Effective People, written by Stephen Covey, outlines a principle-centered approach to personal and interpersonal effectiveness. These habits are:

1. Be Proactive:

   Take responsibility for your life. Proactive people focus on their circle of influence rather than their circle of concern.

2. Begin with the End in Mind:

   Define your mission and goals in life. Start with a clear vision of your desired direction and destination.

3. Put First Things First:

   Prioritize and manage your time effectively. Focus on important, not just urgent, tasks.

4. Think Win-Win:

   Seek mutually beneficial solutions or agreements in your interactions. Value and respect others' perspectives.

5. Seek First to Understand, Then to Be Understood:

   Listen empathetically to understand others' perspectives before seeking to be understood yourself.

6. Synergize:

   Work together to achieve greater results. Value differences and create innovative solutions.

7. Sharpen the Saw:

   Renew yourself physically, mentally, socially/emotionally, and spiritually.

For more detailed information, consider reading Stephen Covey's book, The 7 Habits of Highly Effective People.