(Optional) Write a sub-UVP headline that supports your UVP.
The sub-UVP should be something that better clarifies or amplifies your UVP. Think about it like a second UVP. While not all websites employ the sub-UVP, it's certainly doesn't hurt to have one.
Example (StartitUp):
UVP: Build. Grow. Get Funded.
Sub-UVP: The Ultimate Startup Guide
Example: (SEOmoz):
UVP: SEO & Social Monitoring. Made Simple.
Sub-UVP: Effectively Manage Your SEO and Monitor Your Social Media