The leader is always right.
You cannot question the leader.
If you question or defy the leader, it usually means ostracision/imprisonment/execution.
Protests are illegal or strictly monitored for dissent and no meaningful change will occur because of said protest.
People are snatched away under suspicion of treason and without a fair trial (usually the suspect has no trial, or a sham/show trial).
News and media is usually selective and controlled by the leader and propaganda is dispersed to the populace to maintain the status quo.
Making jokes or comedic routines about the leader is punishable by imprisonment or death, because above all else, tyrants are bullies and cannot stand to be mocked.
They usually disband/arrest labor unions and workers' rights groups or co-opt them and trick workers into voting for those who would see them come to harm.
The economy usually functions to push wealth to the elites because it becomes easier to manage a nation when you have loyalist sycophants running the industries that keep the economy producing.
The military is usually used to crack down on dissent and revolutions, usually violently.
The military and police forces are very well paid and rarely see meaningful consequences for breaches of conduct or excessive uses of force because maintaining an armed group loyal to the leader is how you secure leadership.
If it's a theocracy, usually a singular religion is allowed, and all others are removed as heretical.
If it's a monarchy, usually the king/queen requires high taxes to maintain their lavish lifestyles.
Keep in mind, these are generalizations and it depends on what kind of autocrat you're dealing with.