Perform Salah

[1] Standing right
For the able-bodied, leaning or not standing upright invalidates prayer. If one is incapable of standing, one may sit, lie on the right side, lie on the left side, lie on one's back or as one is able to do.
[2] Having intention for prayer
The person should be conscious and aware of the particular prayer that is being offered, whether it is obligatory, if it is a missed (qadha) prayer, performed individually or among the congregation, a shortened traveller's prayer etc. The explicitly verbalization of this intention is not required, though can be helpful.
It is done simultaneously with [2] takbeeratul-ihram (below).
The person should think his prayer to be the Last Prayer so that he may perform the best he can.
[3] Takbeeratul-Ihram
By raising the hands up to the level of the shoulders, or earlobes with the fingers slightly apart, saying الله أَكْبَر (transliteration "Allahu-akbar", meaning God is the Greatest/God is Greater) is the start of the prayer.
[4] Reciting Al-Fatiha
Recitation of Al-Fatiha is obligated for every raka'ah then With Bismillah Ar Rahman Ar Rahim (In the name of Allah, Most Gracious, Most Merciful)
Reading another 
surah after Al-Fatiha is also obligatory for the first two raka'ah for all obligatory prayers, however it is required in all raka'ah of supererogatory.
[5] Ruku'
Ruku' is bowing the body until the palms are on the knees. Ruku should be such that when a person is bowing, his back should be erected at an angle at which poured water may not fall from it (means at 0' back w.r.t 270' legs) Stopping means all major body parts including arms, wrists, head, legs stop - as long as saying "sub'han-Allah". If the body still moves, stopping is not done. An additional option is to read 3 times سبحان ربى العظيم و بحمده (Glory to my Lord, the Most Magnificent Most Praiseworthy).
[6] I'tidal and stopping
I'tidal is standing again after ruku'. While the body is raising up, an additional option is to read سمع الله لمن حمده (Allah Listens to him who praises Him). During standing, an additional option is to read ربنا لك الحمد ملء السموات وملء الأرض وملء ما شئت من شئ بعد (Our Lord, to You is due all praise...). The body must stop as long as saying "subhanallah" Then after that say "Allah Akbar" (Allah is the Greatest) and raise hand to the shoulders as person did previously at the start and then go to sajda.
[7] Prostration [Sajdah]
Prostration involves putting the following parts of the body - the bare forehead, both palms, both knees, the base of the toes of both feet - on the place of prostration. The forehead must be bare; a covered forehead invalidates prayer. An additional option is to read 3 times سبحان ربى الأعلى و بحمده (Glory to my Lord, the Most High Most Praiseworthy). There are two prostrations, the second being performed after sitting between two prostrations
[8] Sitting between two prostrations
During the sitting between the two prostrations, an additional option is to recite: " Allahummaghfirli, warhamnii, wajburnii, warfa'nii, warzuqnii, wahdinii, wa'afinii, wa'fu'annii" Oh Allah Forgive Me, Have mercy on me.
[9] Sitting for final Tashahhud
The final Tashahhud must be done while sitting.
[10] Final Tashahhud
At-tahiyyatu lillahi was-salawatu wat-tayyibatu was-salamu 'alayka ayyuha Annabiyyu warahmatullahi wabarakatuhu Assalamu 'alayna wa 'ala `abadillahi assaliheena Ash-hadu anna la ilaha illa Allah Wa Ash-hadu anna Mohammmedan 'abduhu warasuluhu. Shia version: Tashahhud Rule 1109 by Ayatullah Sistani, In the second unit of all obligatory prayers, and in the third unit of Maghrib prayers and in the fourth unit of Zuhr, Asr and Isha prayers, one should sit after the second prostration with a tranquil body, and recite tashahhud thus:
"Ash hadu an la ilaha illal lahu wahdahu la sharika lah, wa ash hadu anna Muhammadan 'Abduhu wa Rasuluh, Alla humma salli 'ala Muhammadin wa Ali Muhammad". And it will be sufficient if one recited the tashahhud this way: Ash hadu an la ilaha illal lahu was ash hadu anna Muhammadan Sallal lahu Alayhi Wa Aalihi Abduhu Wa rasuluh.
 It is also necessary to recite tashahhud while offering Witr (in Namaz-e-Shab) prayers. Salam in the prayers Rule 1114 by Ayatullah Sistani, While a person sits after reciting tashahhud in the last Raka'at, and his body is tranquil, it is Mustahab to say:
Assalamu 'alayka ayyuhan Nabiyyu wa rahmatullahi wa barakatuh. Then he should say: Assalamu Alaykum and as a recommended precaution add to it Wa Rahmatullahi Wa Barakatuh. Alternatively, he can say: Assalamu Alayna Wa Ala Ibadi llahis Salihin.
But if he recites this Salam, then as per obligatory precaution, he must follow it up with saying: Assalamu Alaykum.
Translation of Tashahhud and Salam Al Hamdu lillah, Ash hadu an la ilaha illal lahu wahdahu la sharika lah (All praise is for Allah, and I testify that there is none worth worshipping except the Almighty Allah, Who is One and has no partner). Wa Ashhadu anna Muhammadan 'abduhu wa Rasuluh (And I testify that Muhammad is His servant and messenger). Alla humma salli 'ala Muhammadin wa Ali Muhammad. (O Allah! Send Your blessings on Muhammad and his progeny). Wa taqqabal shafa'atahu warfa' darajatahu (And accept his intercession, and raise his rank). Assalamu 'alayka ayyuhan Nabiyyu wa rahmatullahi wa barakatuh (O Prophet! Allah's peace, blessings and grace be upon you!). Assalamu 'alayna wa 'ala 'ibadil lahis salihin (Allah's peace be on us, those offering prayers - and upon all pious servants of Allah). Assalamu 'alaykum wa rahmatullahi wa barakatuh. (Allah's peace, blessings and grace be on you believers!)
[11] Greetings for Prophet Muhammad and for Prophet Abraham
Required portion: At least by saying اللهم صلى على محمدAllaahumma salli 'alaa Muhammadin O Allah, bless our Muhammad Recommended portion: 
اللهم صلى على محمد وعلى آل محمد كما صليت على إبراهيم وعلى آل إبراهيم
وبارك على محمد وعلى آل محمد كما باركت على إبراهيم وعلى آل إبراهيم
فى العالمين إنك حميد مجيد

Allaahumma salli 'alaa Sayidina Muhammadin wa 'alaa ali Sayidina Muhammadin Kamaa sallaita 'alaa Sayidina Ibraaheema wa 'alaa ali Sayidina Ibraaheema Innaka hameedun Majeed Alaahumma baarik 'ala Sayidina Muhammadin wa 'alaa ali Sayidina Muhammadin Kamaa baarakta 'alaa Sayidina Ibraaheema wa 'alaa ali Sayidina Ibraaheema Innaka hameedun Majeed

[12] First greeting
Greeting "peace be upon you" to the right side. At least with السلام عليكم, at best السلام عليكم ورحمة الله وبركاته
[13] Tartib
Follow these steps one by one from the standing right to the first salam. All other movements and recitations save these steps are called the sunnah