I read a lot about the importance of being positive, develop positive views and positive thoughts.
Although I really think that it is important to think in a constructive way I am not avoiding the negative.
There are real problems and if you see unhealthy things happening then do not close your eyes.
Being positive for me is the willing and believe that everything could be turned into good, being happy about the success already accomplished and the energy to create more positive aspects and situations.
Related post: How to be happy.