In my experience, I've known people to take the techniques of positive reinforcement much too far. They do not acknowledge negative emotions and constantly try

In my experience, I've known people to take the techniques of positive reinforcement much too far. They do not acknowledge negative emotions and constantly try to stay as positive as possible which alienates them from people reacting to negative events (and can also make those people feel terrible because they're not as 'positive' as the other person). You can take anything too far, and I think the risk of positive psychology is being too happy in inappropriate times. That said, for someone who is prone to depression, moodiness, rumination and anxiety training ones self to dig rails for positivity is incredibly important and necessary. I tend to think of my thinking and mood as either a snowball effect or like a very deep groove thats been built over time. Thats what causes even small negative experiences to drop me deep into depression - the depression is like a groove with somewhat high walls, easy to fall into. Digging an equally deep positive groove requires what the OP's article suggests, and can eventually help to move more easily between them. I've noticed that procrastination seems to follow the exact same pattern - if I start my morning with news and trivia then its far more difficult to move off of it later.