If you cannot find the verification link in your email, it's likely that it is being blocked by your email settings, or by a security filter.
To fix this, please try the following:
Copy and paste the link into a new tab or window in your browser. This should be the same as if you clicked the link and should resolve the issue.
Add contact@coinbase.com to your contact list, then log out of your Coinbase account and then log in again to have a new verification email sent.
Try using a different browser or clearing your browser's cookies and cache. Then log out of your Coinbase account and log back in.
"Enable HTML" in your email settings. A quick google search should provide instructions on how to do this. Once that is complete, log out and back into your Coinbase account as with the other options to send a new verification email.