I believe in the power of negative thinking. It is good to think negatively sometimes. It puts you on guard. It protects you against forces that could crop up in the future.
Negative thinking works like this: when you are making decisions and probably strategizing a big plan, your negative thoughts will caution and question you against probable risk. There's no great plan without risk and failures. While your gut instinct tells you you can do it, negative thoughts will measure the Pros and Cons and tells you the result.
Realize that negative thoughts does not have control over you. You control it the same way you control positive thinking.
A truly positive mental attitude can be put off if not backed up by negative thinking.
You cannot expect to be successful 100% of the time and that is where negative thinking comes to play. Whether in business, finance, medicine, relationship or science. If you are not prepared for negative results, a few setbacks, loss of promotion, job and marriage, bully, such experience will cause you an unnecessary amount of confusion and doubt.
Both positive mental attitude, good work ethics and negative thinking are important in getting the best out of life endeavors...put the power of negative thinking to use and you'll be happy ever after.
How has it worked for you?

It strengthens ur plans by asking salient questions u must have neglected