If there’s one thing you can always teach an old iPhone user, it’s new tricks. And thankfully, both CNET and Wiki Pac have both just put together big lists of some awesome iPhone tricks and features that you may not even realize exist. While we’re sure there are some iPhone junkies out there who know about all these features, both lists cover such a wide list of tricks that there’s likely something new in here for everyone. Among the highlights are the ability to undo what you just typed just by giving your iPhone a quick shake; how to close up to three apps at the same time by swiping up on your device with three fingers; how to teach