A fantastic set of warm-up tapes, one for each voice part, was made by Roland Wyatt, vocal coach to the Manhattan Transfer (Vocal Jazz quartet) If you practice 20 minutes a week with this tape it will reinforce everything a good vocal coach or voice therapist will show you, and makes good, healthy singing and speaking automatic. I used to lose my singing/speaking voice often, and for extended periods, and now I never do. I get the tapes(they wear out, eventually) from my former choir director at leespear@music-works.com. I'll bring some info on them to the next FSGW Open Sing. Also, if you are older, your thyroid may need a little help - your doctor can test you for this. It does affect your singing, and is easily and inexpensively treated. Your medical insurance may pay for some sessions with a voice therapist, especially if you lose your voice often, and it affects your work.