When booking flights, particularly between US & Canada & other international destinations, compare booking 2 one way flights vs. roundtrip. Due to different taxes, I've saved hundreds of dollars on business travels (when I was an agent, I did it for my clients) by taking this route. It doesn't work 100% of the time, but for the few minutes it takes to compare, always check it out. And don't always feel the need to fly both ways with the same airline. I've also saved hundreds by using 2 different lines each way.
When in doubt, technology can help you out big time here. Apps like FitStar, Daily Burn, and Yoga Studio can help you put together your own personal workout. However, what more and more business travelers are turning to are digital fitness trackers like Fitbit. These work not only like pedometers, but actually keep track of when you step, and encourage you to take a short walk or do some light exercise after long periods of immobility.
For example, when I went to Cuba, I collected several bags of computer cables, electronics, and other household and personal items to donate through a local casa particular run by a family. When I went to Myanmar, I linked up with a group of punk rockers who volunteered to feed the homeless and provide school supplies to rural areas. My friends and I brought supplies and supported their compassionate work, and I wrote multiple articles about them.