Always carry a pack of tissue. Empty your pockets of valuables so that you won't have to retrieve them later from the watery grave. If the bathroom offers you wooden or plastic toilet shoes, consider using them instead of anointing your own. Finally, make sure that you don't have any shirt tails, hems, etc. If you face the flusher you have something to hang onto if your balance is not up to snuff.
Women tend to flush before, during, and after using the toilet to mask embarrassing noises.
Hopefully the recent water shortages have convinced more companies to provide the electronic equivalents. Occasionally you will be lucky enough to find mixed facilities where urinals line the side walls on the way to the stalls. Consider this a rare glimpse into history. In areas with consistent water shortages, toilets may be equipped with flushing foam and run by electricity.