As easy as it is to say this, it is not that easy to implement it. A single negative thought can easily overshadow the many positive achievements you have made so far. Sit down, take a deep breath and list down all your accomplishments one by one. They do not need to be big; the smallest thing like receiving a thank you note from a customer should also be listed down. After all, it is all the small things that eventually add up to make a bigger picture.