You may need to retire a product that you love but is not selling, or change your branding because it's does not reflect your style anymore, or stop working with a group because it's not benefiting you or your business. Whatever it is at some point in time you will have to say good-bye.
Saying good-bye does not mean it's over, in reality it's really just the beginning. You are entering a new phase and you need to acknowledge that change to move forward.
Even though making the change will be difficult, because you are used to the way thing work and things flow easily, it may be time to say good-bye.
Whatever the reason is you have to say good-bye it is important to say the words even if it's to yourself. The ritual of saying the words releases us from our present situation, and shows respect for what just ended.
Trust that what ended was good and useful, and now that you have let it go you can now move on with freedom.
Is there something in your business that you need to say good-bye too?