I have to admit that one of the great things about my job is that once I set the parking brake on that big ole' Boeing 777 jet I don't think much about it. This leaves a nice amount of time to pursue other interests, even while technically "at work." Plein Air painting while on a layover in Guam today makes an otherwise pleasant and relaxing day something that much more enjoyable and productive.
Even from a hotel room balcony one can paint.