To get a handle on the financial side of your business, you need a good grasp of:

Maximising the revenue
What are you doing to get sales happening; What are you doing to ensure customers pay their invoices?

Getting your costs under control
What are your fixed and variable costs? How compressable are your costs? What can you do differently to radically restructure your cost base?

Understanding the balance sheet & what the numbers mean
What are you key financial ratios? What are you doing to lower working capital; get capital off your balance sheet?