Because I'm a teacher, I'm able to be away for several weeks in the summer when I can afford it. Many of my trips with my son have been a month or more in length. About once a week, we get tired of going, going, going all the time and decide on an "easy" day. We may sleep in a bit, do one or two smallish sights or walks - but not taxing ones, and return early for a rest before dinner - or even get take out and "stay in" for the evening. This seems to be enough to recharge us for the next leg. It doesn't seem to effect the jet lag issues at all. Sometimes we don't need this, but when we do, we keep things flexible enough that we can.

Susan in Maryland