Environment is such an important thing if you want to succeed. I have had problems with that and when I changed my environment, the people I listened to, the things I watched - I felt my thinking change, I started to think more empowering thoughts which are necessary if you want to achieve success in your life and get through the tough times.
Your environment is everything around you - the music, TV shows, people, radio, what you read, even food.
So check your environment and see if its helping you get what you want. If not, then change that!