Having a successor is important for three reasons. It’s good for potential successors. If you are actively preparing someone for a new role, they will feel challenged and they will feel like they have opportunities in the organization. Succession planning is good business sense as it allows flexibility in job assignments and it reduces down time after transitions. And succession planning is good for you. Looking at candidates for new or open roles, the company will be looking for qualified individuals for whom moving would create the least amount of disruption. If an opportunity arises and there is someone prepared to take your place you will have less guilt about breaking your non-verbal commitment to your team. It seems counterintuitive, but the best strategy for you is to make yourself replaceable.