No business has a perfect record when it comes to retention. Even your best customers will eventually move on at some point, and not necessarily because of a lack of performance on your end. When you come to terms with this reality, you'll be better prepared for when it happens. 

As a former Navy SEAL, I can assure you that you won't win every battle. The goal is to win the war. The same applies to building a business. As an entrepreneur, I have experienced losses at all levels. But the one that stings the most is losing a customer. And losing your biggest client can feel devastating, whether your company is big or small. 

But it doesn't have to be. Here are the nine things you need to do for your company so you're positioned to recover quickly when you lose your largest customer. 

Be flexible with your staffing
Audit current processes
Perform an after-action review
Fix it
Audit your other accounts
Make responsible cuts
Sell, but thoughtfully.
Do a morale check
Don't lose heart

Nobody likes losing customers, but it happens. Have a plan, stay positive, and keep moving forward. If you do this, it will sting less each time.