Anytime you see a link in Safari or Mail, you can tap and hold it to reveal options beyond simply opening the new page. I constantly use this feature when I'm looking at the news in my personalized Yahoo page. If I see a news story I want to read, I tap and hold the link so that the page opens in a separate tab. That way I can quickly go back to the original Yahoo page without having to use the back arrow and waiting for the page to reload. The options in Safari also included adding the linked page to your Reading List. Tapping and holding a link in Mail also gives you the option of adding the page to your reading list as well as opening the page in Safari. Finally, the options include copying the link so you can paste it elsewhere.
To bring up the options related to a linked page, simply tap and hold. In Safari you'll see options for Open, Open in New Tab, Add to Reading List, and Copy.
In Mail, you'll see options for Open, Add to Reading List, and Copy.
