Remembering Allaah to oneself is encouraged. Allah says:
وَاذْكُر رَّبَّكَ فِي نَفْسِكَ تَضَرُّعًا وَخِيفَةً وَدُونَ الْجَهْرِ مِنَ الْقَوْلِ بِالْغُدُوِّ وَالاٌّصَالِ وَلاَ تَكُنْ مِّنَ الْغَـفِلِينَ
And remember your Lord within yourself, humbly and with fear and without loudness in words in the mornings and in the afternoons, and be not of those who are neglectful).
And seeking comfort and relaxation to the heart and mind through the remembrance of Allah is legislated in the religion. Allah says:
﴿أَلاَ بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ﴾
(Verily, in the remembrance of Allah do hearts find rest.)
However, the dhikr being performed should be in accordance to how the Prophet sallahu alayhi wa salam and his companions would remember Allaah by. Allah says:
فَاذْكُرُواْ اللَّهَ كَمَا عَلَّمَكُم مَّا لَمْ تَكُونُواْ تَعْلَمُونَ
“Remember Allah in the manner He has taught you, which you knew not (before)”
Verily there has appeared new methods for dhikr which have opposed the guidance of the Prophet sallahu alayhi wa salam. In particular the methods invented by the soofiyyah in establishing four concepts of dhikr by performing it in seclusion, in a place of silenc, being in a state of hunger, and when feeling sleepy. Some even add that you should perform dhikr by keeping your eye on a specific place in the room without looking away from it so you could attain comfort for the heart. Therefore, anything the likes of these new methods should be avoided and warned from. And Allaah knows best.
AbdulFattaah Bin Uthman