This book by Gary Keller was a number 1, Wall Street Journal bestseller. The authorâs credibility derives from his being the founder of Keller Williams Realty International, which is the largest real estate company in the world, by agent count.The book opens with a dialogue between Curly and Mitch from the comedy/drama, âCity Slickersâ.Curly: Do you know what the secret of life is?Mitch: No. What?Curly: This. [He holds up one finger.]Mitch: Your finger?Curly: One thing. Just one thing. You stick to that and everything else donât mean sh*t.Mitch: Thatâs great, but whatâs the âone thingâ?Curly: Thatâs what youâve got to figure out.The route to extraordinary success, according to Keller, is the discovery of what your âOne Thingâ is.As children, we were required to do things when the time came: breakfast time, time to go to school, time to do homework, bath time, and bedtime. As we got older, we were given the discretion to choose when to do things, but not whether â homework before bed. But as adults, everything becomes a choices, and it is these choices that define our lives. This book addresses the question of how to make good choices.Without a clear formula for making decisions, everything feels urgent and important. The âOne Thingâ is such a formula.Keller describes the search for the âOne Thingâ tightly: âWhatâs the One Thing you can do this week (day/month or year) such that by doing it, everything else would be easier or unnecessary?â He reports that where he has had huge success, it was always a function of narrowing his concentration down to one thing - and the converse was true too.Your to-do list probably contains many entries and possibly a few rated âAâ. What this indicates is that you could be focusing attention on all your âAâs today, as opposed to the âOne Thingâ that will help you achieve your major âOne Thingâ in your business or private life. To-do lists commonly lack the focus on the âOne Thingâ - success. âIn fact,â notes Keller, âmost to-do lists are actually just survival lists.â Survival lists are long, success lists are short.Keller uses this principle to explain why some people seem to get ahead where others donât. Why, with the same number of hours available, do some succeed and others donât? The successful identified the âOne Thingâ that they really wanted to achieve, and applied the âOne Thingâ principle to it, daily. This is not limited to work, but to oneâs health â (What is the one thing I should do to increase my fitness?), marriage, income, and so on.This is the realization that not everything matters equally and that focusing on many things precludes giving your âOne Thingâ the time and effort it deserves.To grasp the full intent of the criteria for a true âOne Thingâ, focus needs to be on the second half of the formula: âWhatâs the ONE Thing you can do this week such that by doing it everything else would be easier or unnecessary?âTo illustrate the power of this insight, Keller cites the âdomino effectâ. This effect is the repercus sions of an act on every associated entity, like a row of standing dominos that falls when just the first one is pushed over. In an article in the prestigious American Journal of Physics in 1983, Lorne Whitehead described how a single domino can bring down another domino that is actually 50 percent larger.Getting extraordinary results is all about creating a domino effect in your life through the âOne Thingâ principle.The âOne Thingâ bears a striking resemblance to the over-used Pareto Principle, or the â80-20ârule, and differs only in that Kelly takes it to the extreme. His call it to take the 20% of your activities which will give you 80% of your benefit, and identify the âOne Thingâ from that - the vital few of the vital few, until you get to the essential One Thing. All efforts are not equal, some will produce significantly more.To be able to say âyesâ to the âOne Thingâ requires saying no to all else. âWhether you say âlaterâ or âneverâ, the point is to say, ânot nowâ to anything else you could do until your most important work is done,â Keller advises.The suggestion that human beings can multitask is nonsense. Professor Clifford Nass of Stanford University, conducted enough experiments to conclude that âmultitaskers were just lousy at everything.â The term was developed to describe computers not people, and the computers only processed only one piece of code at a time, just fast enough to appear as multitasking.Once the âOne Thingâ of your work or current concern is identified, you wonât have to become a extremely disciplined human being to achieve. We already, naturally, have more discipline than we need: we simply need to direct and manage it a little better. âWhen you see people who look like disciplined people, what youâre really seeing is people whoâve trained a handful of habits into their lives,â Keller observes.Success is about doing the right thing, not about doing everything right.Before retiring, Michael Phelps had won 22 medals, making him the most-decorated Olympian in any sport. His coach since age 11, Bob Bowman, talked of his ability to focus as his greatest attribute, despite the fact that others said he would ânever be able to focus on anythingâ. It would be fair to say that Phelps channelled all of his energy into one discipline, the One Thing, that developed into one habitâswimming daily.The results from developing the right habit are inevitable, they produce both the success you are searching for which greatly simplifies your life.âItâs not that we have too little time to do all the things we need to do,â Keller notes, âitâs that we feel the need to do too many things in the time we have.âThe âOne Thingâ is hardly a new notion, anyone who ever attended the 30-minute motivational speech at the company conference, has heard it. But hearing the message is quite different from internalizing it. Reading this very accessible book will ensure the message is internalized.And you will be very pleased you did.Readability Light -+--- SeriousInsights High -+--- LowPractical High ---+- Low*Ian Mann of Gateways consults internationally on leadership and strategy, and is the author of the recently released âExecutive Update.