Picture a lack of persistent focus this way: You want to thread a needle in order to sew something up. You focus very intently on the end-of-the-thread and the eye-of-the-needle, lining them up about a half-inch away from one another. You can see with just a bit of forward movement the thread will easily enter the eye. The goal is so close and the conclusion is obvious. Now on to something new! You look out the window at the rustling leaves on the nearest tree. Your hand with the thread moves in the direction of the needle and it misses.
With whatever you want in life, you can’t simply “set it and forget it”. You have to see it through, keeping your focus on it the entire time. This isn’t “babysitting” it, you’re engaging with it. You WANT to watch it happen, seeing it unfold before you — that’s the point of doing it. When you watch a movie for example, you’re not simply skipping to the end, you’re watching the events progress and conclude. In the same way, don’t just devise a goal and wish for it’s hasty conclusion, maintain your focus in an interested way.
If you’re not showing interest, why bother finishing it — right? It’s like playing a game on your phone in the middle of a movie, who cares how the movie ends, you’re obviously not interested anymore — stop the movie and move on. Similarly, if you’re not following your goals along and taking daily interest, why bother seeing them through to the end, you’re not that interested. This is why you need persistent focus in order to get results. If you simply say: “I want a better life!” and then you do what you usually do, it’s not gonna work obviously.
You have to maintain a persistent focus on this goal of yours. You have to delve into it. What would you actually change? What parts need improvement? Is anything already good as-is? What’s the better stuff you’d want to experience? Can you provide some details, perhaps dig-up some examples? What would your improved daily schedule be like? In other words, you should focus so much and so often that the details of your goal become ingrained in your thoughts. With this level of considered attention aimed at your goal, you’ll surely thread the needle.