Deliverability is critical for email, SMS, and push notifications; if messages don't reach the inbox, they won't be effective.

Running experiments is crucial; a company is not just a product but a mission that should be continuously worked on if it is alive.

Launching your product is essential; failing to do so can prevent you from gaining valuable feedback and iterating effectively, but it's not as significant to your users as it is to you, so prioritize launching sooner to validate if it solves their problem.

When starting something new, especially in an established category like email, it's crucial to focus on a specific user base rather than trying to please everyone. I believe that creating a product with deep appeal to a small group of people is more effective than trying to attract a broad audience from the start.

Before launching Gmail, many inside Google doubted its value and predicted failure, but we must not let such voices drag us down.

You need to ensure your operating system in the cloud is constantly updated and monitored for security, similar to how Gmail operates with over 1.2 billion users.

To maximize productivity, it's crucial to prioritize your to-do list over being driven by emails and meetings.

Execution is crucial; all these founders had to build products that worked effectively and handled significant amounts of money, proving that talk is cheap but execution is hard.

If you have extra engineering time, creating effective email templates can be super beneficial for your startup.