Indeed, it is in the Remembrance of Allah, Glorified and Exalted is He, that hearts find rest. In that regard, I wish to bring to your attention the attached booklet on ZIKR by Sayyid Muhammad N. Naqshbandi. Find time to peruse the booklet and see/appreciate the importance of Zikr as a form of Worship (Ibadat), and renew that vigour in you. Enjoy it.