1. Act before your bank statements get too tight.
2. Keep a steady minimum level of cash in the account. Don't be caught out by the number of days a in a month that a direct debit would fail. Having a bank overdraft facility in place is not a bad thing because it can show more affordability to make loan repayments.
3. Directors; don't pay yourselves excessively. It sends out the wrong signal to your lenders.