A few things you can do.
Log into your ticketmaster account before you start.
If you are at work, try to get a few colleagues in the same room to go online at the same time. Once one gets the tickets you want, then the others stop. But don't stop until they are just about to take payment, as it's not clear that you will get the tickets otherwise.
If you are trying to get 4 tickets, it might be worth one of you trying for 4 and two others trying for two each.
If it's all sold out, then try for one ticket. This has worked well for me in the past. Asking for two tickets did not work. But asking for one , twice did. Obviously, you will not be sitting beside each other.
Brendan