profitable but generating little operational cash (as may be the case for a company that barters its products rather than selling for cash). In such a case, the company may be deriving additional operating cash by issuing shares, or raising additional debt finance.
cash flow can be used to evaluate the 'quality' of Income generated by accrual accounting. When Net Income is composed of large non-cash items it is considered low quality.
to evaluate the risks within a financial product. E.g. matching cash requirements, evaluating default risk, re-investment requirements, etc.
Cash flow is a generic term used differently depending on the context. It may be defined by users for their own purposes. It can refer to actual past flows, or to projected future flows. It can refer to the total of all the flows involved or to only a subset of those flows. Subset terms include 'net cash flow', operating cash flow and free cash flow.

Ways Companies Can Augment Reported Cash Flow

Common methods include:

Sales - Sell the receivables to a factor for instant cash. (leading)
Inventory - Don't pay your suppliers for an additional few weeks at period end. (lagging)
Sales Commissions - Management can form a separate (but unrelated) company and act as its agent. The book of business can then be purchased quarterly as an investment.
Wages - Remunerate with stock options.
Maintenance - Contract with the predecessor company that you prepay five years worth for them to continue doing the work
Equipment Leases - Buy it
Rent - Buy the property (sale and lease back, for example).
Oil Exploration costs - Replace reserves by buying another company's.
Research & Development - Wait for the product to be proven by a start-up lab; then buy the lab.
Consulting Fees - Pay in shares from treasury since usually to related parties
Interest - Issue convertible debt where the conversion rate changes with the unpaid interest.
Taxes - Buy shelf companies with TaxLossCarryForward's. Or gussy up the purchase by buying a lab or O&G explore co. with the same TLCF