Product-led models create deep loyalty and organic demand, providing a stable business foundation. Marketing-led models can scale faster but risk high customer churn and rising acquisition costs if the product doesn't resonate, leading to business volatility. An ideal approach blends both strategies for sustainable scale.

Avoid a fixed allocation of resources between core products and new initiatives. Instead, treat the investment mix as "seasonal." Periodically and purposefully reassess the balance based on the most pressing business needs—whether it's stabilizing the core for large customers or pushing aggressively into new markets for growth.

Square's product development is guided by the principle that "a seller should never outgrow Square." This forces them to build a platform that serves businesses from their first sale at a farmer's market all the way to operating in a large stadium, continuously adding capabilities to manage growing complexity.

Contrary to the 'diversify revenue' mantra, having too many offers increases complexity in marketing, systems, and support, which erodes profit margins. Focusing on fewer, well-promoted offers almost always outperforms a scattered product suite.

The tension between growth and profitability is best resolved by understanding your product's "runway" (be it 6 months or 6 years). This single piece of information, often misaligned between teams and leadership, should dictate your strategic focus. The key task is to uncover this true runway.

Most features don't have direct, attributable revenue. Forcing feature-level ROI calculations leads to flawed logic and kills morale. Product leaders should instead prove their entire portfolio is "earning its keep" by generating a multiple of its cost.

In a multi-product company, horizontal teams naturally prioritize mature, high-impact businesses. Structuring teams vertically with P&L ownership for each product, even nascent ones, ensures dedicated focus and accountability, preventing smaller initiatives from being starved of resources.

Entrepreneurs often assume the product generating the most revenue is the most valuable. However, when factoring in the time and energy required for delivery (return on time), that "bestseller" might actually be the least profitable per hour, making it a poor candidate for scaling.

When choosing between serving a large community with small products ("pebbles") and taking big enterprise clients ("boulders"), focus on the pebbles first. Building a larger audience and profile creates more leverage, making future deals with boulders more favorable. Big clients are always there; community momentum can be fleeting.