Shaikh Junaid Baghdadi (Allah have mercy on him) said,

‘We did not acquire Tasawwuf by discussions or argumentations.

In reality we acquired it by going hungry (1), keeping awake (2) and being persistent in our actions (3).’

Eqaz al Himam, Urdu, page 332

(1) From all that is impermissible or suspicious or causes laziness.
(2) In acquiring knowledge, performing tahajjud, remembrance of Allah and intimate conversation with Allah
(3) Performance of good and abstinence from sinful deeds, both physical and that of qalb