Do these in numerical order. There are others that I use for specific purposes, but if you do these 3 - 6 times a week, your vocal technique will improve. Be sure to keep an open space in the back, keep your tongue root out of the way, tip of the tongue behind the bottom front teeth, and, if you feel pain, stop doing the exercises and hire a good singing teacher. As I complete more PDFs, they will be here, so check back

1. Descending 5 note scale
2. Major 3rd Slides
3. La My Na Gom
4. Yoo hoo hoo hoo hoo
5. This thou these those them
6. I-V7 Arpeggio (advanced)