There is more to this system than a simple listing of the seven habits. However, this list should give an insight into what the skills are and involve.
You are responsible for your life. Decide what you should do and get on with it. "The ability to subordinate an impulse to a value is the essence of the proactive person."
Think of the legacy you wish to create in every aspect of your life, and then make every decision and take every action on the basis of that desired legacy. "All things are created twice," first mentally and then physically or actually.
Probably the most crucial. Reduce time spent on things that are urgent but unimportant and devote more time to what is more important but not necessarily urgent.
Know that there is enough to go around. Life isn't a zero-sum game where the only way I can win is if someone else loses. Have what Covey calls an Abundance Mentality. Seek solutions that benefit all parties. If you can't find such a solution, don't make an agreement.
Listen empathically (getting inside the other person's frame of reference so you listen with one purpose: understanding) until you truly understand the other person's position. Then work on ensuring that you clearly communicate your thoughts and ideas.
Create a solution or a design or an approach better than either party could have produced individually. The fruit of the teamwork embodied in Habits Four and Five.
The commitment to continuous improvement in each of the four aspects of human existence: Physical, Mental, Spiritual, and Social-Emotional.