1. Become more aware of your thoughts. Are they predominantly negative or positive? Think positive
2. When a negative thought enters your mind, immediately replace it with a positive thought. THINK POSITIVE! Positive thinking is the way to success.
3. Be kind to yourself and do at least one thing a day that you enjoy doing, and which makes you happy.
4. Every day, find the time to listen to music that you love and enjoy.
5. Read about the life of positive and successful people. You can find many articles on them on the Internet, and also in many books.    
6. Visualize your life as you wish it to be, and believe in what you visualize.
7. Do not listen to people who tell you that you cannot do this or that, persuade you that you lack the right skills, or constantly tell you that you are a failure.
8. Always prefer to watch inspiring, motivating, or funny movies. They would help you maintain a happier and optimistic attitude.
9. Learn how to use affirmations. These are positive statements that you repeat over again, just like autosuggestion. They are a great tool for building a positive attitude.
10. Read, study, and start to use the power of visualization. When you know how to use it effectively it can improve your life in every area.
11. The book Affirmations Words with Power is a complete tutorial on how to use affirmations, not only to attract success, love, and possessions but also to build new habits and change your mindset.
12. The book Visualize and Achieve Your Dreams is a complete system for changing your attitude, make it more positive, and attract success into your life.

If you have a positive attitude and constantly strive to give your best effort, eventually you will overcome your immediate problems and find you are ready for greater challenges.