The second tip on the RCMP site is that parents and caregivers should always insist that very young children hold the caregiver's hand continually while walking to and from stores, play grounds, etc. Older children must remember to stay very close.
The third one is similar, in that children must not wander off, not even play hide and seek. But if the child gets lost or separated, he or she must know to tell someone "with a name tag" such as a cashier or security guard (preferably a woman).
Fourth, children should be encouraged to travel in groups, and use the buddy system. (I would warn that travelling in groups isn't always safe. Someone could go missing and not be noticed for a long time.)