Before the tickets go on sale:
Your event is announced
Find out if there is a presale
Find the presale password(s) and use it during the presale
Try during the regular onsale for tickets
If you didn’t get the tickets you want:
If you don’t get the tickets you want, don’t buy from scalpers!
Check StubHub and Ebay to see what the market value is
Start checking for ticket drops a few days before the event
Wait until the day of the event (around 3-4:00) to buy tickets