First find out about the positions of all military bases on the planet that you can find out.
Second, destroy all satelites, crippling communications.
Third, orbitally bombard the military bases(if you don't have the technology for that, drop some large rocks from orbit to destroy them).
Fourth, send troops to all major cities on the planet, especially capital cities and try to force government to surrender.
Fifth, demonstrate your will to any and all who rise up through public executions of rebels. At the same time, try to be very kind to all who cooperate so that they see no reason to fight.
Second, destroy all satelites, crippling communications.
Third, orbitally bombard the military bases(if you don't have the technology for that, drop some large rocks from orbit to destroy them).
Fourth, send troops to all major cities on the planet, especially capital cities and try to force government to surrender.
Fifth, demonstrate your will to any and all who rise up through public executions of rebels. At the same time, try to be very kind to all who cooperate so that they see no reason to fight.