Do you have a tendency to see a glass half empty or half full? How you see that glass determines how you percieve your world. If we look at everything from a negative perspective, most things in our lives are going to turn out negative, and we will continue to attract negative experiences into our lives. If we choose to look at our experiences as positive, we will start to attract good into our lives. Everything is essentially neutral, it's how we view things that causes an experience to be either good or bad. We can decide to put either a positive or negative spin on everything we encounter in life, and when we do, even something that is quite obviously negative can be viewed as a positive. We learn from even those things that challenge us.
It all begins with our thoughts, and remember- a thought can be changed.
SOLUTIONS FOR NEGATIVE THINKING:
Try to find the lesson in every challenging situation; you will find there is always something wonderful to learn from it.
Look for something good in every experience. There will always be something positive.
If you have a negative thought, immediately replace that thought with a positive one. It's easier than you think.
Compare yourself to someone worse off than you. That always puts things into perspective.
Give all the negativity up to God to handle, because there is nothing too hard for God to handle.