Dozens of iPhone tricks you've probably never heard of
Boy Genius Report called attention over the weekend to a pair of articles ticking off tons of iPhone tricks and features that you might not know are actual things — but that would save you tons of time and headaches, impress your friends and family members, make you the life of your next cocktail party, etc., etc.
Many are fairly well known. You can shake your iPhone to undo whatever you just typed. You can set up custom vibration alerts for your contacts, much the same way you'd set up custom ringtones. Others are probably more niche: You can teach Siri the correct pronunciation of words and names that she's been mangling, for example.
See if there are any tips in here of interest to you: