Yeah - it's nice in the winter time, but the furnace blaster takes some getting used to.
Your bike temperature readout should be at 2 bars at speed, bumping up to 3 bars during extended idle or slow speed traffic. At 4 bars, the fan should kick on and remain on until the readout drops to 3 bars, then shut itself off automatically. Of course, your coolant level should be at least at the "low" point for the overflow tank at cold engine, and no higher than the "high" point while the fan is running. I set my level at the mid-point with a cold engine and it seems to work fine.
Otherwise, my goretex lined boots seem to insulate a good bit against the foot/ankle heat. A full tank of gas also acts as a pretty good heat sink. BION - when I'm touring in hot weather, and know that slow speed or traffic is ahead, I'll sometimes fill up the tank for a little relief.