Punctuation was not invented just to catch you out. The point of those dots and squiggles is to make what you've written easier to read think of them as signposts to show the way through the words. This book is not a compendium of convoluted rules but a handy guide to making your writing clearer.
Buy Who's Afraid Of Punctuation? by Stephen Haynes from Australia's Online Independent Bookstore, BooksDirect.