I take my running clothes and shoes with me on every trip. If I can't go for a run outside, I will usually get in a session or two on the hotel's elliptical trainer or treadmill.

I try to make reasonable food choices. I stay away from fried foods and red meat for the most part. I try to eat a lot of grilled chicken and relatively low fat stuff. I also try to get whole grains as much as possible.

I take these high quality nutritional supplements. They are not cheap. But I don't drink coffee... so I figure I'm spending monthly about the same as most folks do on Starbucks. I have definitely noticed that I get sick less often since I started taking these five years ago.