Did you ever notice that when you want or purchase a new item, you start to see that item everywhere? It is our perception...what we focus on. Much like a camera, where you focus the lens is what you will capture on film.
This is the primary concept when we discuss maintaining a positive frame of mind. What we focus on is what we get.
Daily practice on focusing on positive events that take place in our lives will train our minds to only see the positive things that are happening to us and around us. In contrast, if we focus on only the things that go wrong in our lives, then we will generate and swim in negativity.
This is not to say that we should walk around with rose colored glasses, ignoring things that go wrong or problems. We should acknowledge problems for what they are...a chance to exercise skills to solve them and improve. Mental weight training of sorts...
When we train our perceptions on issues to a more positive outlook, we spend almost zero time and energy on placing blame, making excuses and complaining but instead speed our way towards not only finding a solution and grasping the lesson that comes from the process.