The above are good suggestions--except the alcohol. Alcohol is very damaging to the vocal folds. As a voice major many moons ago, I learned that voice rest IS the most important portion of the healing process, provided that there is no underlying serious condition. You should get to a good Dr. & be sure you are on the mend. I have known folks who had persistent laryngitis which the Dr's could not fix, & there was no apparent reason. One friend had gone almost 4 months without getting better. At that point, I suggested what I have had to do. As above, total voice rest. Also, do not consume any form of sugar, potatoes, flour, or dairy products-which can cause mucous to form in the body. Citrus can also be too acidic for inflamed vocal folds. My friend's boss was almost hysterical when she took a few weeks off, but after a month she was tremendously improved. Good luck!