Sayyidi wa sanadi Mufti Mohammad Taqi Usmani (Allah preserve & protect him) instructed,

‘The highest level (achieveable for a human being) is to be (a true) slave of Allah. (That is, ‘abdiyet.)

May Allah bestow this to us. (Ameen).

In order to facilitate this I suggest doing this excercise.

Tell yourself

‘O Allah! I am Your slave  (abd)  and You are my Master (Rabb)‘.

Do this repeatedly. Make it a routine habit. Continue doing this excessively until it becomes a spontaneous speech of your heart (and mind).’

Waaz, 7/8/2016, Masjid, Darul Uloom Karachi, after asr