Increase revenue e.g : have a sale, reduce the prices, advertise more
Reduce cost e.g: restructuring, delayering and redundancies or automating production, outsourcing.
Gross profit is total revenue minus the expenses directly related to the production of goods or the cost of goods sold (COGS).
Derived from gross profit, operating profit is the residual income after accounting for all costs.
Net income reflects the total residual income (money a company has left after meeting it's financial obligation) after accounting for all cash flows, both positive and negative.