Not having enough money can be a real challenge for many people. We tend to focus more on what we don't have than what we do have, so it becomes a vicious cycle. Focusing on the abundance of what is already in your life is a good starting point.
Start a journal and write down everything you are grateful for in your life. This should include both living things, such as the people and animals in your life, as well as the material things that bring you joy, like your home or some favorite personal items.
Read Napoleon Hill's book, Think And Grow Rich. This book was written in 1937 but still has relevance today. I only recently learned that this book was edited drastically before it was published. The publisher though that much of the book was too far removed from the thinking of the people at that time. You can get the entire story by taking a look at this site. Let me know what you think. I know it is working for me.