It's graduation season, and this spring's grads face the worst job market in a quarter century. Susan Berg thinks she can help. Her new book is called "Choose on Purpose," and it's full of tips on how to trade your cap and gown for a fulfilling gig in the world of grownups. Susan is giving a free talk at the parish hall of Morristown's Presbyterian Church on May 15 at 1 p.m. Here is a preview. (About 10 minutes.)