I notice the same thing about prospects. Their status is often evident and we can tend to hang on too long to the hope of conversion. The best remedy is new business. I keep a list and recently got very liberal at removing prospects. Why? Incoming prospects with quick conversion and work I enjoy. Rather than hold onto hope of conversion in vain, it behooves us all to develop new business.
Prospects are going to convert to clients regardless of the condition of the rest of our business. However, it sure is easier to set them aside when something of higher value takes their place.