We need to pay our officers more and have fewer of them, If you start to pay the good ones a respectable salary you'll get more accountability.
We need to train our officers better, we should have an apprenticeship program that lasts at least five years where the apprentice officer rides around with a veteran UNARMED until he picks up every skill necessary to do a good job in real time, two years of community college and then a year as park police isn't cutting it.
We need to reduce conflict on the streets, Philando Castile knew that his taillight was out, the problem is that in an impoverished and racially oppressed culture these small fixes become tough to handle when you have other bills to pay. The officer was either going to ticket him or give him a warning, neither of which would have done any good long term, and so you had unnecessary conflict. We need to change the laws so that cops aren't allowed to harass people over minor things like taillights/inspection stickers/small amounts of marijuana/jaywalking you name it.
Black culture needs to change, stop selling CD's on the corner with a gun in your pocket and get a job that supports your kids, this "gangster" lifestyle is a result of rap music.
The media needs to fined by the federal government for disproportionately reporting on content that is intended to get ratings and thus adds to the chaos and race baiting. How many people were killed in Chicago last week? Can you name them? The media outlets need to be fined to take away the incentive to over report on sensational news. We need something along the lines of a "Fair Media Coverage Act" that will completely destroy the financial incentive of media outlets that over report on sensational news, this would hopefully have the dual effect of (over the long term) slowing down the mass shootings that appear to be happening every other month. These rioters/mass shooters/cop killers are doing it for the 24/7 CNN news reel and the people tune in because the chaos is interesting and exciting, like a war movie with real life ramifications. Destroy the incentive.
Just some ideas for real changes.