Watch where you walk. Social wasps nest on the ground and paper wasps nest in trees. Most deaths caused by allergic reactions and occur in 15 to 30 minutes after a sting. In adults it would take about 1,000 stings to cause non-allergic death. Children are more vulnerable.
Common ants are relatively unimportant.
Imported fire ants are a big problem in some areas of the South. Spider bites are generally not severe because their mouth parts are small and can only penetrate skin with difficulty. They have venom that can be irritating and even lethal. No first aid measures are of value. Closer to civilization, an ice cube placed on the bite will provide some relief.