You can change the environment that you are in but until you change yourself nothing else will ever change.
Maintain a positive outlook. No matter how hard things are there is always someone else who is struggling more than you are. Hold your head high and appreciate whats going right instead of focusing on the negative.
Never stop learning, read something every day on the topic of your goals. While you learn you are planting seeds for your future. Knowledge builds confidence, success is built on a foundation of confidence in yourself.