Dhikr of Allah is the most excellent act of Allah's servants and is stressed over a hundred times in the Holy Qur'an. It is the most praiseworthy work to earn Allah's pleasure, the most effective weapon to overcome the enemy, and the most deserving of deeds in reward. It is the flag of Islam, the polish of hearts, the essence of the science of faith, the immunization against hypocrisy, the head of worship, and the key of all success.There are no restrictions on the modality, frequency, or timing of dhikr whatsoever. The restrictions on modality pertain to certain specific obligatory acts which are not the issue here, such as Salat. The Shari`a is clear and everyone knows what they have to do. Indeed, the Prophet said that the People of Paradise will only regret one thing: not having made enough dhikr in the world! Are not those who are making up reasons to discourage others from making dhikr afraid of Allah in this tremendous matter?
Allah says in His holy Book: "O Believers, make abundant mention of ALLAH!" (33:41) And He mentions of His servants "Those who remember their Lord standing, and sitting, and lying on their sides" (3:191), in other words at all times of the day and night. He said (3:190-191): "The creation of heaven and earth and the changes of night and day are signs for people who have wisdom: -- consider who is described as having wisdom -- Those who remember (and recite and call) Allah standing up, sitting, and lying on their sides." `A'isha said, as narrated by Muslim, that the Prophet mentioned/remembered Allah at all times of the day and night.
The Prophet said: "If your hearts were always in the state that they are in during dhikr, the angels would come to see you to the point that they would greet you in the middle of the road." Muslim narrated it. Imam Nawawi in his Sharh sahih muslim commented on this hadith saying: "This kind of sight is shown to someone who persists in meditation (muraqaba), reflection (fikr), and anticipation (iqbal) of the next world."
Allah placed His remembrance above prayer in value by making prayer the means and remembrance the goal. He said:
"Lo! Worship guards one from lewdness and iniquity, but verily, remembrance of Allah is greater/more important." (29:45)
"He is successful who purifies himself, and remembers the name of his Lord, and so prays." (87:14-15)
"So establish prayer for My remembrance." (20:14)
Biographies of the Companions (Sahaabah) this will boost your faith .
here is an example you were a soldier if am not mistaken take look at this from the Biography of Umar bin al-Khattab (r.a)
The Woman Who Pined For Her Husband
In the wars that were conducted during the rule of Umar, the soldiers on the front remained absent for considerable periods. Umar introduced the reform that leave should be granted to every soldier after he had served on the front for four months. A story is recorded as to how this reform was brought about.
It is related that one night Umar went on his round in Madina as usual. It was the dead of night, and every where was quiet. From one of the houses in the street, Umar heard a lady lamenting. She said:
"The night is wearisome and keeps me sleepless;
For I have none to keep me company.
I fear Allah, Who keeps watch over our souls,
And would not take another companion,
But who could tell Umar,
That he should not be so cruel,
As to keep my husband away from me,
For such a long period."
Umar knocked at the door, and when the lady came to the door he said:
"I have heard, what you wanted to be conveyed to Umar.
How long has your husband been away."
The lady said, "About a year."
Umar said, "Rest assured your husband would come back to you shortly."
Umar consulted Hafsa as to the maximum period for which a man might remain separate from his wife. She suggested a period of four months. Umar accordingly issued orders to the effect that unless a man of the armed forces could take his wife with him, he should be allowed a spell of leave after every four months of active service on the front.
SUBHANALLAH this i 1400 years ago we muslim were are still at the fore front