Those deeds which are beneficial for warding off fear of the grave

One of them is performing Ruku' with entire recitation. Imam Mohammad-al-Baqir (A.S.) says, that a person reciting entire recitation of Ruku' in Namaz will be saved from the fear of the grave. And one who recites.

لااله
الاالله
الملك
الحق
المبين

100 times daily, will be saved from anxiety in the grave, will become prosperous, and the doors of Paradise will be opened for him. It is also related that the person who recites Surah-al-Yaseen before going to bed, and the following Namaz (Namaze Lay latur Raghaib), he will be saved from the terror of the grave. The first night of the month of Rajab is known as Laylatur Raghaib.
The Holy Prophet Mohammad (S.A.W.S.) used to fast on the first thursday of the month of Rajab, and between Maghrib and Isha Prayers recite twelve Rak'at Namaz (in Si sets of two units) as under:
In every Rak'at after Surah-al-Hamd recite three times Surah-al-Qadr and twelve times Surah-an-Naas. After Salaam recite seventy times:

اللهم صل على محمد النبي الامي وعلى اله

Then go into prostration (Sajdah) and say seventy times:

سبوح قدوس رب الملائكة والروح
Then sit erect and say seventy times:

رب اغفر وارحم وتجاوز عما تعلم انك انت العلي الا عظم
 Then again go into Sajdah and say seventy times:

سبوح قدوس رب الملائكة والروح
 It has been related that a person who fasts for twelve days in the month of Sha'ban, Allah will send seventy thousand Angels daily to his grave. And if a person visits an ailing man, Allah appoints an Angel for him who accompanies him in his grave till Qayamat.
 Abu Sa'eed Khudri says, that he heard the Holy Prophet (S.A.W.S) telling Amirul Mo'mineen Ali (A.S.), "O Ali! Give glad tidings to your Shi'ahs that their death will be eased, and they will be saved from the terror of the grave and Qayamat".

Ref :Manazale Akherah