What should the NFL do for Concussions?

In the NFL people are starting to have issues with the concussions and injuries that are coming with the sport. Even in high school kids are getting hurt all the time and some schools are even not letting kids play the sport anymore. There has been talk about changing the helmets to try and prevent these injuries, but even with that it still isn’t working very well. What do you think the next step should be to try and prevent so many injuries?