After you have signed the deal, you need to prepare for the transition from your startup to the buyer or partner. This can be an emotional and challenging time, but you can take steps to ensure a smooth transition process. Start by communicating with your team, customers, suppliers, and other stakeholders about the deal and its implications, and address their questions and concerns. It's also important to acknowledge your achievements, milestones, and learnings, as well as thank those who have contributed to the success of your venture. Additionally, you should make sure to hand over any responsibilities, assets, and documents to the buyer or partner. Lastly, decide whether you will stay or leave the startup and what your next move will be. Don't forget to take care of yourself and seek any help or guidance you need. Merging or selling your startup is a rewarding experience but requires careful preparation and planning; by following these steps, you can increase your chances of success.