For anyone looking for tickets to shows and theatre productions in NYC, here are some websites that may give you performance information and discounts:
www.playbill.com
www.broadwaybox.com
www.schooltix.com
www.broadway.com
www.seasonofsavings.com
www.nycvisit.com
www.tdf.org
The last site also gives information on the TKTS discount booths located in Times Square and at the South Street Seaport, and will tell you which shows have been available in the past week at TKTS.