What are the things that help in performing the night prayer (Tahajjud).

The helpful reasons for performing night prayers are numerous, including:

Sincerity to Allah alone, realizing that Allah calls for performing them, knowing the virtue of night prayers, observing the state of the righteous predecessors in their performance, sleeping on the right side, sleeping in a state of purity, taking a nap during the day, avoiding excessive eating and drinking, striving against oneself to perform it, avoiding sins and disobedience, and accounting oneself and scolding it for neglecting the prayer.

Thus, night prayer is an act of worship that connects the heart to Allah and makes it capable of overcoming life's temptations. It is a confirmed Sunnah that the Prophet, peace be upon him, urged to perform, and the righteous predecessors maintained it.