Move your treasures out of reach. Learn about your child's limits and developmental stages, so that you gain the insight to set appropriate expectations. You need to learn when your child's fuse is shortest, and when he is most likely to tolerate grocery shopping, or a long car rides. Make sure that your child is fed and rested before going somewhere demanding. Be aware that babies and toddlers are naturally curious and exploratory.
Children can also be slow, clumsy and messy.
Distraction works very well for toddlers and preschoolers, because they have a short memory span. When kids are bored, they tend to fight. Interest them in another activity or toy to alleviate sibling fighting. You may look out the window at the trains. You may not run, scream or swing the dividers.