As the title says - could you share your best strategies to remove this effect, especially early game. Started a new game and have to keep them 7-10 days in jail (with maid suit and handcuffs/collar) with occasional scolding and slapping. Any way to make this process more efficient?

I am aware of potions for late game, but the most efficient way for me was Domination - at times it took just 1 day in prison to get rebellious effect removed.

You can reduce the duration with punishments

Rape them till they max out stress, and either put them in jail or equip handcuffs on them. End the day and they will have a mental breakdown, so long as they aren't low in HP(they might die), they will no longer rebel.

The fear spell helps with jail time.

Thanks guys, I have tried different combinations of strategies and it seems like for early game keeping their Fear and Stress at maximums results in 2-5 days before the trait is removed which is very decent. Have to have someone assigned as a Nurse though, but both starting slave and Emily are perfectly capable of that.