O you who believe, remember Allah abundantly,  [33:41]
and proclaim His purity at morn and eve.[33:42]

Sayyidi wa sanadi Mufti Mohammad Taqi Usmani (Allah bless him with a long, healthy and productive life with ‘afiyet, Amin!) said,

‘It must be remembered that if the tongue is not immersed in vocalization of remembrance of Allah the heart (qalb) will never be habitable (to the remembrance of Allah).

This is because the remembrance of Allah by vocalization via tongue is like the first step. If an individual does not climb it, then how can he reach the (real) remembrance, (that is) with the heart.

Therefore, the first step in developing a sustainable relationship with Allah is the remembrance with tongue (dhikr e lisani). This must never be abandoned.

Dhikrullah kay fadhail, page 11

In this discourse Shaikh mentions the various methods of remembrance prescribed by the Sufis, including the dowazdah tasbih that is staple dhikr of Ashrafiya path.

It usually takes 30 plus minus 5 minutes . It is preferably done after tahajjud or fajr salah in solitude with as much concentration as possible.

This is the kickoff.