How best to recover from a strained voice...

Last night In preparation for our first open mic scheduled for this evening our trio had a full rehearsal during which I sang more than I ever have. This morning I woke up with a sore throat...the kind of "enlarged tonsil" feeling we have when on the verge of becoming sick. So, my question/plea for advice, how should I spend today in preparation for this evening's gig? No talking...drink gallons of water....sip warm tea with honey...go back to sleep for the rest of the day? And, how should I adjust (if at all) my warm-up prior to singing this evening. Any advice will be greatly appreciated!
Comments
Hope that helps.
However, the most important thing is to know why you had a sore throat. Do you have it more often after singing?
All the best,
Ben