Don't have time to read an article? Save the Web page by tapping the menu button (three dots to the right of the omnibar) and choose Save Page. To find it later, go to Saved Pages in the left sidebar. Pages you save are available even when you're offline, which is great for those internet-free commutes.
In the bottom-right corner of the browser, you'll see a number, which represents the number of tabs you have open. Tapping it lets you see an overview where you can open another tab, or manage already-opened tabs. To quickly close all tabs, long-press any web page, and choose "Close all tabs." There are also a few options, like Close Other Tabs, which closes all tabs but the one you long-pressed.
Instant Page Load (under Cloud Features) is a convenient feature that predicts where you're going to go next, and automatically load that next page in anticipation. It does make browsing a little snappier, but does use more data than usual.
So, if you're watching your data usage, disable this feature.