I'm lucky to be living in Australia and even though our weather is (slowly) getting colder, I can still walk around outside barefoot.
One thing I have heard is that having showers, or letting the water run on your feet is quite grounding. The pipes connected to the shower drain run underground. So it is basically a source of running, grounded water. I always feel relaxed after having a shower but if I am having a particularly stressful day, I will take my shoes of and let the shower run on my feet for a few minutes. Not sure if it is a placebo or not, but it certainly makes me feel better!
RE: Natural Ways to Relieve Stress