ass salaamu alaykum wa rahmatullah!!!!
Qiyaam al-layl/at-tahajjud is sunnah and not waajib , or was it sunnah mu'akkadah!! ??...i can't remember...inshaAllah if sum1 can correct that then plz do so!!....
Here i have enlisted sum Ahaadeth about how many rakahs are to be prayed , and the prophet sallalaahu 3alayhi wassallam used to strive towards it and never miss a prayer unless he was sick....i have also put in it's rewards and benefits..
Narrated 'Aisha:
Allah's Apostle used to offer eleven Rakat and that was his prayer. He used to prolong the prostration to such an extent that one could recite fifty verses (of the Quran) before he would lift his head. He used to pray two Rakat (Sunna) before the Fajr prayer and then used to lie down on his right side till the call-maker came and informed him about the prayer.
Narrated Jundab:
The Prophet became sick and did not get up (for Tahajjud prayer) for a night or two.
Narrated 'Ali bin Abi Talib
One night Allah's Apostle came to me and Fatima, the daughter of the Prophet and asked, "Won't you pray (at night)?" I said, "O Allah's Apostle! Our souls are in the hands of Allah and if He wants us to get up He will make us get up." When I said that, he left us without saying anything and I heard that he was hitting his thigh and saying, "But man is more quarrelsome than anything."
Narrated Al-Mughira:
The Prophet used to stand (in the prayer) or pray till both his feet or legs swelled. He was asked why (he offered such an unbearable prayer) and he said, "should I not be a thankful slave."
Narrated 'Aisha:
A woman from the tribe of Bani Asad was sitting with me and Allah's Apostle (p.b.u.h) came to my house and said, "Who is this?" I said, "(She is) So and so. She does not sleep at night because she is engaged in prayer." The Prophet said disapprovingly: Do (good) deeds which is within your capacity as Allah never gets tired of giving rewards till you get tired of doing good deeds."
Narrated 'Ubada bin As-Samit:
The Prophet "Whoever gets up at night and says: -- 'La ilaha il-lallah Wahdahu la Sharika lahu Lahu-l-mulk, waLahu-l-hamd wahuwa 'ala kullishai'in Qadir. Alhamdu lil-lahi wa subhanal-lahi wa la-ilaha il-lal-lah wa-l-lahu akbar wa la hawla Wala Quwata il-la-bil-lah.' (None has the right to be worshipped but Allah. He is the Only One and has no partners . For Him is the Kingdom and all the praises are due for Him. He is Omnipotent. All the praises are for Allah. All the glories are for Allah. And none has the right to be worshipped but Allah, And Allah is Great And there is neither Might nor Power Except with Allah). And then says: -- Allahumma, Ighfir li(O Allah! Forgive me). Or invokes (Allah), he will be responded to and if he performs ablution (and prays), his prayer will be accepted."
PS :is this what the brother wanted , I did'nt really understand the question!
TELL ME THE SUNNAH OF DOING TAHAJJUD/QIYAMMUL LAIL !!! ......:?:?
but i hope this helps!!
wa alaykum ass salaam
and besides, think of this as an opportunity to increase your Islamic readings!! perhaps you will come across hadeeth you never knew before and thus it will increase your knowledge insha'allah 
;D . Well explained, but I didnt mean to lengthen my hair below my shoulder ukhtee but yes maybe just about my shoulder. And yes maybe youre right that we may not (I mean the men) comb the hair if its not the usual tradition in here to do that, Allahu A'lam. It will be haram if its only done just top get everyones attention right? Masha Allah well done sis 
