. " , ' ; ! - ? _ Are all examples of ...... Often Misused Punctuation

Rod has an interesting post about where and when you should use apostrophes (arguably the most misused punctuation).  If you were ever curious, and want a good laugh while being educated, you should read "Eats, Shoots and Leaves".  This book contains hundreds of illustrations of where you should and shouldn't use a range of punctuation and IMHO should be a core teaching requirement for all high schools!