By being intentional and deliberate in your approach, you can build an excellent user experience that performs well regardless of screen size.
Lara Callender Hogan is an engineering leader, coach, and consultant at Wherewithall. Lara is also the author of Designing for Performance, Building a Device Lab, and Demystifying Public Speaking. She champions engineering management as a practice, helps people get comfortable public speaking, and believes it's important to celebrate career achievements with donuts. Follow her on Twitter.
Lara Hogan walks through tactics you can employ to be a sponsor for those around you.
The largest hurdle to creating and maintaining stellar site performance is the culture of your organization. Read chapter 8 from Designing for Performance.