Keep drinking hot drinks after breakfast to start the day with a good supply of fluids. Even while packing, pause and sip a little cocoa, hot liquid jello or whatever. The last thing to do after the tents are down and packs packed is to remove down booties and put on your boots. The boots will be warm from hanging underneath your jacket. Warm boots with warm feet is the only way to start touring.
Feet are one of the hardest parts of the body to warm up.
If they start to get cold, it may be a couple of miles down the trail before they again feel comfortable. Pack overboots and down booties, check to make sure the camp is clean, and you're off for another day.