The verse says "We have sent it (the Quran) down in the Night of Determination, and who has told you what the Night of Determination is? The Night of Determination (qadr) is better than a thousand months. In it (i.e. this night) the angels and the Spirit descend with (decision upon ) every matter, with the permission of their Lord. It is all peace till the break of dawn (97:1-4)
This night, held to be between the 26th and 27th of Ramadan, we should observe.. waiting the time, let us spend it in devotional prayers... solat malam, qiamullail. Doa, and renew our taubat.