I keep a lot of tabs open all day to watch the home page, work in our CMS, moderate the site’s comments, and check the analytics. But the more tabs I open to do the rest of my job, the more crowded Safari’s tab bar becomes. Pinned sites is great for cutting that clutter. I can tap on a tab’s name with two fingers (for a right-click) and select Pin Tab from the popup menu, and that tab will stay open—and stay updated—but with a much smaller “footprint” in my tab bar. The pinned tabs appear on every new Safari window I open, which I love. You can’t even accidentally close them by pressing Command-W—instead, just right-click one again for the options to close it or unpin it.