For micro-stock, I have portfolios on a dozen different sites. However, I really only publish images on a regular basis to ShutterStock and iStock. Between my micro-stock sales, I have averaged about $250 a month on average. The best part of micro-stock for me is that it’s fairly residual and passive. I spend very little time on it, and it keeps coming month after month even if I stop working at it.
When you arrive at your destination, be open and try to take note of the first impressions—write them down if you have to. (A notebook is an essential accessory for a travel photographer.) When you see a place for the first time from the plane window, or when you drive around a bend and there it is, or as the ship nears some distant island—how do you feel? Where do your eyes go first? What do you notice about the place right away? A smell? The heat or cold? Blistering sunlight? Mysterious fog? A particular building or vista? The way people move? Their dress? Whatever it is, remember it. First impressions are invaluable sparks to creative interpretation, and by definition are not repeatable. You've seen the place in pictures, you've read about it. Now you're there, and all your senses can partake.