There are a number of disciplines that Sufis engage in as part of their worship. The point of all of these disciplines is to achieve "extinction." This means that they are trying to break down their sense of self so that they no longer feel as if there is a difference between them and God.
In order to achieve this, Sufis do a variety of things. The most famous of these to us in the West is a form of whirling dance. This is what Westerners are referring to when they mention "whirling dervishes." Sufis also do things like breathing exercises and like reciting sacred names and phrases. So that would be three different methods: dancing, breathing exercises, and recitations of these sacred names and phrases.