Your words, thoughts and feelings affect each other, and also affect your actions. If you're like most people, the easiest of these to control is what you say. And by changing the way you express things, you can actually improve your performance and effectiveness. Studies have found that optimistic people perform at a higher level than pessimists. Optimists look at a situation and see benefits, opportunities and learning experiences.
Pessimists look at the same situation and see only the risks.
The fact is that most people talk, in everyday life, in negative terms. It's so common that few people even realize they're doing it. I'm enjoying life. Notice how much better that feels. It seems silly and insignificant, yet make it a habit and it will quickly change your outlook.