But in narrower scope, the best way is to support the inevitable court case against FCC that will follow their expected decision. That will prompt politicians who are backed by ISP monopolists to propose a "solution", i.e. legislation that will supposedly address Net neutrality.
That's where the real fight will begin. They'll try to push a fake law that won't protect anything but will make it even harder to ever change things for the better. The public will have to put a lot of pressure on their representatives to voice interest in a proper law.
Another part of the solution would be pushing for more municipal networks and for ending of the obnoxious monopolistic grip of Comcast and Co. That also requires repealing a lot of anti-competitive state laws (so again, put pressure on your representatives if you live in one). Real (not fake) competition will naturally prevent many of the issues that Net neutrality tries to address.