After successfully landing on the planet, the next step is to secure your position as the supreme ruler of the galaxy.
Use your trusty advanced mind-control technology to subjugate the native population and establish a strong, iron-fisted rule.
Remember to also establish a strong, well-equipped Imperial Navy to protect your empire from any potential threats.
Don't forget to set up a Galactic Ministry of Truth to control the flow of information and suppress any dissent.
And, of course, make sure to have a solid Plan for the Inevitable Uprising.