Thanks, I'll check that book out. And my cousins agree, also so I can learn the unique sounds of the Thai alphabet and everything.
One thing that helped was learning to read and write Thai from the start. It will re-enforce your spoken Thai immensely, because you will find yourself automatically studying vocabulary every time you see a sign posted in Thai. Also, get a good textbook. I used one called Thai for Beginners, by Benjawan Poomsan Becker. She has an intermediate and advanced book also.