Lifestyle changes become a natural part of your routine. In the beginning, weight loss does require some focus as you find ways to create a calorie deficit. The key is to build the new actions you are taking (diet changes, exercise, etc.) into a habit. We know the most effective way to create a habit is to set goals and take action repetitively over and over until it feels like a normal part of your routine. You may need to change strategies once in awhile if your current path isn't working well in your lifestyle. Focus on the areas of your diet and exercise that could use some tuning up and then do these things repetitively. This is a way to create a new normal way of eating and hence the words lifestyle changes.
Lifestyle changes have to be something you can do on your own. Following someone else's plan is only a temporary fix. In my 10 years as a dietitian working in this industry I have never witnessed or heard of someone following a strict meal plan long term. It would be truly difficult to do as it takes away personal preference and choice. The trick is to learn how to meal plan on your own. Those tricks that the professionals use to make those meal plans are something you can do on your own. It isn't as difficult as you might think. It is also very important in order to be able to make lifestyle changes. You have to know what you are doing first. When you have this knowledge you can plan your meals anytime, anywhere within an appropriate calorie level. Planning is important.
Making true change takes some focus, practice, tweaking, and then it becomes much easier and part of your routine. When approaching any part of your life where you want to change habits give yourself the space and support to allow all these steps so you can reach your goals.