Prototyping allows you to visualize the final layout and design. This step is important for establishing expectations and preventing issues from occurring later in the development process. 

Determine the coding standards and guidelines the team will follow to ensure code quality and consistency. 

Leverage HTML tags for better accessibility and SEO.

Use preprocessors like SASS or LESS for improved maintainability, nesting, variables, and mixins.

Apply consistent naming conventions, group related CSS rules together, and break down complex JavaScript code into smaller functions.

Use project management tools and version control systems like Git to track changes and collaborate seamlessly. 

Use practices and features like efficient image formats, lazy loading, and Content Delivery Networks for faster delivery. 

Beginning with basic functions, incorporate new features, and create your website progressively in layers.

With techniques like media queries and fluid grids, apply the principles of responsive design to guarantee that your website adapts to and is compatible across different devices and screen sizes. 

Add semantic HTML elements, alt attributes, and keyboard navigability to ensure your website is accessible to users with different abilities. We test your website with various accessibility tools to identify potential improvement opportunities.

Assess all core functionalities and test your website across different browsers to ensure cross-browser compatibility. 

Integrate tools like Google Analytics to collect data and allow you to respond to behavioral insights.

Integrate testing into your continuous integration and continuous deployment pipelines to minimize instances of errors.

Implement a comprehensive quality assurance plan to test your solution rigorously and resolve issues before they interfere with your final product. Use unit, end-to-end, and visual regression testing as part of your plan.

Using tools like Google PageSpeed Insights or Lighthouse, monitor and assess performance.