Profit First by Mike Michalowicz

Conventional accounting uses the logical (albeit, flawed) formula: Sales - Expenses = Profit. The problem is, businesses are run by humans, and humans aren't always logical. Serial entrepreneur Mike Michalowicz has developed a behavioral approach to accounting to flip the formula: Sales - Profit = Expenses. Just as the most effective weight loss strategy is to limit portions by using smaller plates, Michalowicz shows that by taking profit first and apportioning only what remains for expenses, entrepreneurs will transform their businesses from cash-eating monsters to profitable cash cows.