Responsive Web Design Do's and Don'ts

Don't Clutter
Do Keep UX in Mind
Don't Use Small Links
Do Go Mobile First
Do Optimize Plugins
Do Use Responsive Web Design
Don't Hide Content for Mobile
Don't Neglect Touch-Screens
Do Use Fluid Layouts
Do Use Large, Readable Fonts
Do Understand UI
Do Plan Your Layout
Do Test 3rd Party Plugins

Source: https://gibsonads.com/responsive-web-design-dos-and-donts/