Ways of The Prophet (S.A.W)

Excellent time for Tahajjud Salaah

The excellent time for Tahajjud Salaah is in the later part of the night, the minimum being two Rakaats and the maximum being twelve Rakaats. [Bukhari, Muwatta]

If one is unable to get up at night then he should pray a few Rakaats after lsha Salaah. But the reward will be less. Offering Salaah other then obligatory Salaah at home is excellent. As such offering Tahajjud Salaah at home is virtuous. It is better to offer Salaah at night with taslim (salutation) after every two Rakaats. As such Tahajjud Salaah should be offered with taslim after every two Rakaats.