Watch out for the paramilitaries. When the men with guns who have always claimed to be against the system start wearing uniforms and marching around with torches and pictures of a Leader, the end is nigh. When the pro-Leader paramilitary and the official police and military intermingle, the game is over.
Learn from others in other countries. Keep up your friendships abroad, or make new friends abroad. The present difficulties here are an element of a general trend. And no country is going to find a solution by itself. Make sure you and your family have passports.
Establish a private life. Nastier rulers will use what they know about you to push you around. Scrub your computer of malware. Remember that email is skywriting. Consider using alternative forms of the internet, or simply using it less. Have personal exchanges in person. For the same reason, resolve any legal trouble. Authoritarianism works as a blackmail state, looking for the hook on which to hang you. Try not to have too many hooks.
Hinder the one-party state. The parties that took over states were once something else. They exploited a historical moment to make political life impossible for their rivals. Vote in local and state elections while you can.
Take responsibility for the face of the world. Notice the swastikas and the other signs of hate. Do not look away and do not get used to them. Remove them yourself and set an example for others to do so.
Investigate. Figure things out for yourself. Spend more time with long articles. Subsidize investigative journalism by subscribing to print media. Realize that some of what is on your screen is there to harm you. Bookmark PropOrNot or other sites that investigate foreign propaganda pushes.
Believe in truth. To abandon facts is to abandon freedom. If nothing is true, then no one can criticize power, because there is no basis upon which to do so. If nothing is true, then all is spectacle. The biggest wallet pays for the most blinding lights.