All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu 'alayhi wa sallam, is His slave and Messenger. In Ihyaa 'Uloom Ad-Deen, Al-Ghazaali mentioned the means which facilitate for Muslims performing the Qiyaam prayer and divided them into two sections: apparent and hidden.First: The apparent means include four things:1-      Avoiding excessive eating. Otherwise, one will drink excessively and, consequently, he will be overtaken by deep sleep and will not be able to wake up to pray during the night.2-      Avoiding work during the daytime which exhausts the body and weakens the nerves.3-      Avoid committing sins during the daytime as they lead to harshness of the heart. 4-      Taking a nap during the day in order to be able to wake up for the voluntary prayer during the night.We can add:5-      Not to stay awake after the 'Ishaa (night obligatory) prayer unless there is a need. Second: The hidden means include four things as well:1-      Keeping the heart safe from hatred against Muslims, Bid'ahs (innovations in religion) and excessive worries concerning this world.2-      Fearing Allaah and not having far reaching ambitions in this world.3-      Knowing the virtue of performing Qiyaam by listening to Quranic verses, Hadeeths and reported citations.4-      Love of Allaah and having strong faith that one invokes His Lord, Who Is Acquainted of him, during the prayer. Allaah Knows best. (Source: islam_web) Classified in Salah (Prayer) > Supererogatory Salah