Find a website that caters to selling Broadway tickets. The website www.nyc.com endorses www.broadway.com as its official seller for tickets.
Select a show you'd like to see. On the home page of www.broadway.com, there is a drop down menu for "Find a Show" with hit shows listed. If you'd like to search for more shows, click the "See all Broadway Shows" button at the bottom of the menu. This will direct you to a page that provides a brief synopsis of each broadway show, as well as times during the week for each show.
Click the "buy tickets" button on the left hand side of the page for the show. This redirects you to a calendar where you can select which time and date you'd like to see the show.
Select how many tickets you'd like from a drop down menu and where you want to sit based on the seating and pricing diagram. You will have to check a box that corresponds with a price and area you wish to sit in. Click "Proceed." (If you choose, you can add a dinner package to the price of your ticket if you want to eat before the show.) Enter your billing information and click "Proceed."
Pay for the tickets. The Broadway website requires a credit card for payment and accepts Visa, Mastercard or American Express.
Go to a TKTS booth. There are two in Manhattan: one is in Times Square (at Broadway and 47th), the other in the financial district, near the Prudential Building at Front and John Streets. There is also a booth in Brooklyn, at the corner of Jay Street and Myrtle Avenue.
Get to each location early and stand in line. For example, some theater box offices might open briefly in the morning (for an hour or two) and allow you to purchase tickets, while others might open in the afternoon, one to two hours prior to a show. In contrast, the TKTS booths have set hours, but those hours can vary. For example, the TKTS booth in Times Square has daily hours of 3 p.m. to 8 p.m. But it also opens from 10 a.m. to 2 p.m. on Wednesdays and Saturdays to sell matinee tickets only (see Resources below).
Set aside different times to try and get tickets as some box offices and the TXTS booths will release tickets at one time and then release another flood of tickets a little bit later in the day, usually a few hours before the show according to Glenn Michael Gordon's artice, "How to buy Broadway Tickets."