It is incredibly important to regularly look at all of your accounts and determine which are likely to grow and which are not. That sounds like a simple thing to do, but most sales professionals do not take the time to analyze their accounts and divide them into these categories.
Certain accounts will not grow every year, and sometimes should be treated as maintenance accounts. These might be some of your largest accounts and market leaders, but if you see that it will be tough for them to grow in a particular year, then you need to look at them more as maintenance accounts.