That's a great title for helping people avoid common pitfalls in web design! Here's how we can enhance it to make it even more engaging:

Full Title Suggestions:
Top 3 Web Design Mistakes to Avoid: Save Time & Improve Your Site!

The Top 3 Web Design Mistakes You're Probably Making (And How to Fix Them)

3 Common Web Design Mistakes to Avoid: Tips for a Better Website

Why this works:
"Mistakes to Avoid" immediately signals practical advice, helping people who want to avoid costly or frustrating errors.

"Save Time & Improve Your Site" adds a benefit-focused angle that appeals to those wanting a quicker and more effective web design process.

"How to Fix Them" implies actionable steps, giving the audience a sense that they'll be learning solutions.

Suggested Video/Blog Description:
"Web design is crucial to your online success, but there are common mistakes that can ruin your site's performance. In this video, we'll walk you through the top 3 web design mistakes that many people make and show you how to fix them. Whether you're a beginner or a seasoned designer, these tips will help you create a user-friendly, high-performing website that stands out!"

Thumbnail Idea:
Visual: An image of a broken or poorly designed website (with elements out of place) next to a polished, professional-looking website.

Text on Thumbnail: "Avoid These Mistakes!" or "Fix Your Web Design Now!"