I tend to go with lots of hot peppermint tea with honey in it, which at the very least tastes yummy (though I find it really does help more often than not). Also, drink lots of fluids in general, and rest your voice as much as you can until it heals up. But don't whisper instead of talking normally! I know it seems counter-intuitive, but whispering is actually harder on your vocal folds than normal talking is; they have to stretch tighter in order to produce a whisper sound than they do to produce a normal speech sound. Good luck!
I've strained my voice A LOT (sadly :c I sing a lot and when I tried to change the way I had been singing for 11 years... well... lets say it was painful) and what you should do is avoid talking. Thats always the best thing to do. Its the quickest trick and the most effective.