There are several ways to get your tickets for the Colosseum. The most common way is to wait on the super-long line at the Colosseum. Another way is to wait at the shorter, or non-existent, line at the Palatine Hill ticket window. Obviously, go to the shorter line for your ticket, then check out Palatine Hill, then the Colosseum. You’ll still have to wait on the security line at the Colosseum, but you’ll have saved yourself a lot of time.