Your Domino Goal is that goal, which once you achieve it would make a huge difference in several other areas and domains of your life. And, in this world of limited time, energy and other resources, that is what you should focus on.
I hope you'll visit me at TheLifeaholic.com for more helpful resources, including my workbook: Clarity for Goal-Setting. It contains 10 coaching questions and notes that will help you get clear so that you can set goals that please God and take you forward in any area of your life. It's yours for free if you come over to TheLifeaholic.com. Bye for now.