Working Capital Financing

I have been thinking a lot about working capital financing after a recent conversation I had with my banker in which he alerted me that the bank was continuing to reduce their business line of credit programs and that my commercial loan needed to be repaid during the next thirty days. While I told him I was shocked by this kind of treatment by banks, in reality I was prepared for this happening because of everything I have been reading about similar actions by bankers. I have also been hearing from friends and business colleagues that I should be getting prepared to find a new source for working capital financing.