Not only does Australia have a National Public Toilet Map, but - as Wagga has noted - a Bladder & Bowel Website, a product of a "Take Control" initiative of the National Continence Management Strategy. They seem to have some awfully creative government employees in that country.
How to take a shit: While you should always avoid rushing, it is generally accepted that you should take only a minute or so to empty your bowel. Never strain or hold your breath. Haemorrhoids (or piles) can result from straining. So get into the habit of using a good toilet position. Lean forward while sitting on the toilet, with a straight back and your forearms on your thighs. Your feet should be raised so that your legs are angled slightly upward and away from your body. A footstool may help you to find the best angle.