Jerry: We're just back from Gotham and I agree--the sights and sounds of Broadway and Times Square are hard to beat! As TJCNew York has posted in the past, Junior's Cheesecake, next to the Marriott Marquis, is a place not to be missed and (by NYC standards) not that expensive. Even splitting a piece of the dessert is enough, take it from me.
Also there is now free WiFi available on the Times Square pedestrian area near TKTS, and that for the computer junkie like me is good news.
Speaking of shows many have lotteries and others have what are called Rush Tickets that provide seats at rock bottom prices! Only catch is that you need to be at the box office and in some cases you will need a student ID for these deals. However, with the lack of audiences these days it never hurts to ask the box office if there are tickets at discounts. Also, if you subscribe (free) to www.playbill.com, you'll get frequent emails with discounts on them for most of the shows. Just print them off and bring them to the box office.