1. Bring a tripod
Could be small one, depends on the weight of your camera. Your photos will get so much better in the mornings and evenings when theres not enough sunlight. You will simple be able to avoid blury photos. Use self exposure to avoid touching the camera when you take a photo. This also helps you to avoid blurry photos.
In early mornings you also benefit from less people in touristy areas and also easier and faster to travel.
2. Shoot with the sun behind you
The majority of the time travel photographers prefer to work with the sun behind them or to the side of the subject they are photographing to light up the subject in front.
This eliminates harsh shadows and also the need to use graduated filters to compensate for the difference in highlight and shadow areas. On a sunny day, this gives the image a wonderful glow and vibrant blue skies which are the usual shots that travel brochures and magazines like to use.
3. Use a bag
Put your camera, tripod, hat and something to drink and eat :)
And do not forget to make some photo copies and hang them on the wall.