To stay in focus without being distracted is a very difficult task to hold on its own. It requires a good level of discipline and can be practiced all the time. This area of distractions is heavily involved with multitasking.
There are times where multitasking is handy, but for the most part, it's important to break the habit of doing so. An example of this would be talking on the phone, while putting your shoes on, and trying to eat at the same time. It takes away attention from everything that you're doing. How many times have you multitasked on the phone and had to have people repeat what they were saying? Granted, some people are great at dealing with the situation, but others may be giving a lot more attention to say organizing lunch for the day rather than paying attention to what the other person is saying on the phone.
Keeping multitasking to a minimum level allows full attention and a much better focus in what you're doing, whether it be work, school, or hobbies. Breaking down the necessities for focus is much more key rather than trying to do everything at once. Almost like the turtle and hare race analogy. In addition, having a deep focus allows to view things you wouldn't have before, such as this picture, where instead of just a flower, it is barely beginning to bloom and flourish into something much more extravagant.
Going to keep this short for today. The main idea is to cut-down on distractions and focus on whatever you're doing. It will allow better relationships with people, better output of work, and you may be more satisfied with your results!