Responsive Meet Landing Page

What are you most proud of, and what would you do differently next time?

I like that I was able to build the site. However, I need to spend more time examining the design's structure to try to mimic my HTML with that design scaffolding.

What challenges did you encounter, and how did you overcome them?

Responsive design continues to elude me a little bit. I try to do a lot at once instead of taking it one breakpoint and one section at a time to ensure the area is responsive before moving on. I still need help with this if anyone is willing to provide suggestions.

What specific areas of your project would you like help with?

I need suggestions on how people go about attacking their responsive design. Do people do mobile first and then move on to the big site, or go section by section? Any feedback would be appreciated.