Keeping Hydrated while travelling is extremely important. Most the Earth and Most of your body are made of water, best to keep up the fluids while travelling. Water doesn’t have to be boring, try some local Spring or Sparkling water to keep it interesting.
Next time your travelling, think of photo opportunities that will make great Black and White Photos. Its easy to change to BW in Photoshop or Light-room or even on your ipad but its not possible to turn BW to colour photo easily. So my tip is to think about how the light is falling and what will for interesting BW photos, that way you get the nice colour shot of your trip, but also potentially awesome BW photos.