I live in the Seattle area where the roads are wet almost every day...The best thing I've found is to find a good set of all season high performance tires. I'm using Yokahoma AVS DB's all the way around, and I have to say they are great! I've taken them to the track for hot lapping days and they work very well, even in the wet.
1988 300ZX / 1991 300ZXTT "So they get a plane and just as they're about to catch me, THE TWIN TURBOS KICK IN!"