One of the most important precepts on these kinds of travels is that no matter where you find yourself, no matter what condition you're in, no matter how difficult the circumstance, there will be times in your life when you incline towards it in memory or anticipation. Savoring it or dreaming about it. So when you begin to sense your enthusiasm for present circumstances flagging, call those other times that are pining towards these circumstances to your mind; give yourself, in all frames of experience, access to your present experience. At some point, you will intensely desire precisely this. So allow that desire to work through you now. Allow the time to be fulfilled, and you come into a more full existence.
This also has something to do with motion. On the last peregrination through these climes, I began in the southeast,, went up to the mountains, then across to the west, and then down across the south, and back to the southeast -- over the course of half a year or so, I think. Purely an accident of the places that looked or sounded interesting, and where the rentals would be towards the inexpensive off-season. But then this circle kept repeating itself, and gained its own logic -- I would begin to pine for a place more like the next geography in the cycle. Desire, to state the obvious, has to do with motion in time. But again, it also does some work that is more a priori in nature, not experiential. It knits the life together by reaching across it to different times within it. We're not always entirely transparent to ourselves, but if we were, all times of our life that wished for a certain experience would be able to live through the experience when it occurs.
So desire both carries us onward, and strengthens the inner lines of force, when used correctly. When used incorrectly, we don't translate the inner pressures into present experience--they simply carry us past experience--and perhaps as a result, our external journeys become less attuned to inner promptings.