One of the best tips for TKTS is to go right before the show. So, get there at 1:30 for 2 pm show. There's usually not much of a line, and sometimes, the house releases more tickets right before the curtain (at least that's what I've read). . If you do have an amount of time to kill you can walk up Broadway to Columbus Circle to The Time Warner Center and have cocktails, lunch, and shop, or if the weather is nice, walk around in the southern most part of Central Park.
"The price of love is loss, but still we pay; We love anyway."