Firstly, thank you for your questions about Islam and may Allaah (swt) increase you in knowledge, Aameen! I'll try to add a bit more information Insha'Allaah (God-willing).
1. when praying Zakat your not supposed to say anything after Ahum du illa right? for the 3rd and 4th Raca? or only the 3rd? or only the 4th?
Just to clarify - I think you mean
Salat here, which refers to prayer; Zakat refers to the charity.
Regarding the last two rak'ahs (units) of prayer, the basic principle is that only Al Fatihah (Alhamdu lillah) should be recited in them, but it is permissible to recite another soorah (chapter of the Qur'an) after that sometimes, because of the report narrated by Muslim (452) from Abu Sa’eed al-Khudri (may Allaah be pleased with him), that the Prophet (peace and blessings of Allaah be upon him) used to recite in the first two rak’ahs of Zuhr prayer approximately thirty verses in each rak’ah, and in the last two rak’ahs approximately fifteen verses, or he said: half of that. In the first two rak’ahs of ‘Asr he used to recite in each rak’ah approximately fifteen verses, and in the last two rak’ahs approximately half of that.
Shaykh al-Albaani (may Allaah have mercy on him) said: This hadeeth indicates that reciting more than al-Faatihah in the last two rak’ahs is Sunnah, and many of the Sahaabah held that view, including Abu Bakr al-Siddeeq (may Allaah be pleased with him). This is the view of Imam al-Shaafa’i, whether that is in Zuhr or any other prayer. Among our later scholars, this view was followed by Abu’l-Hasanaat al-Laknawi… end quote. Sifat al-Salaah, p. 113.
From:
http://www.islamqa.com/index.php?ref=69846&ln=eng&
2. my beard isnt full yet i shave everyday so that it can become full. is this bad? or should i just let it grow? shaving it will make it grow faster thats why i do it
Shaykh Ibn ‘Uthaymeen (may Allaah preserve him) said: The definition of the beard as stated by the scholars of (Arabic) language is: the hair of the face, jawbone and cheeks, in the sense that all the hair on the cheeks, jawbone and chin is part of the beard and removing any of it is counted as a sin, because the Messenger (peace and blessings of Allaah be upon him) said: “Let your beards grow,” “Leave your beards alone,” “Let your beards increase,” “Let your beards be full.” This indicates that it is not permissible to remove anything from the beard. But the sin may vary in degree – shaving the beard is worse than shortening it, because it is a more obvious contradiction of the Sunnah.
Al-Nawawi said: the best is to leave it as it is and not touch it or shorten it at all. (
Tuhfat al-Ahwadhi, 8/39).
3. in depth steps of Oozoo (cleaning your self before prayer)
What you mean here is
Wudhoo. Have a look a the following links for details regarding wudhoo:
http://www.islamqa.com/index.php?ref=11497&ln=eng
http://english.islamway.com/flashpage.php?id=3&cat=1&file_name=ablution&width=782&hight=438
6. when i pray i always think about other things. like random thoughts will pop up in my mind i know its satin but how do i stop him?
Evil whispers during prayer and at other times come from the Shaytaan, who is keen to misguide the Muslim and deprive him of good and keep it far away from him. One of the Sahaabah complained to the Messenger of Allaah (peace and blessings of Allaah be upon him) about waswaas during prayer, and he said:
“The Shaytaan comes between me and my prayers and my recitation, confusing me therein.” The Messenger of Allaah (peace and blessings of Allaah be upon him) said: “That is a devil called Khanzab. If he affects you seek refuge in Allah from him and spit drily to your left three times.” He [the Sahaabi] said, I did that and Allaah took him away from me.
(Narrated by Muslim, 2203)
Proper focus (khushoo’) is the essence of prayer. Prayer without proper focus is like a body without a soul. The following are two of the things that help one to develop the proper focus:
1 – Striving to think about what you are saying and doing, pondering the meanings of the Qur’aan, dhikr and du’aa’s that you are reciting; bearing in mind that you are conversing with Allaah as if you can see Him. For when the worshipper stands to pray, he is speaking to his Lord, and ihsaan means worshipping Allaah as if you are seeing Him, and knowing that even though you cannot see Him, He sees you. Every time a person experiences the sweetness of prayer, he will be more inclined to do it. [?]. This depends of the strength of one's faith – and there are many means of strengthening one’s faith. Hence the Prophet (peace and blessings of Allaah be upon him) said, “Of the things of your world, women and perfume have been made dear to me, and my joy is in prayer.” According to another hadeeth he said, “Let us relax, O Bilal, with prayer,” and he did not say, Give us a break from it.
2 – Striving to ward off the things that may distract you during prayer, namely thinking about things that are irrelevant or distracting. Waswaas affects each person differently, because waswaas has to do with a person’s level of doubts and desires and the degree to which a person is attached to other things or is fearing other things.
(From Majmoo’ Fataawa Shaykh al-Islam Ibn Taymiyah, 22/605)
http://www.islamqa.com/index.php?ref=25778&ln=eng
7. in depth details for prayer
Here are some sites that may be useful Insha'Allaah:
http://english.islamway.com/sindex.php?section=prayer
http://muslimconverts.com/prayer/how-to-pray-intro.htm
http://www.islamqa.com/index.php?ref=13340&ln=eng
http://www.load-islam.com/display_lecture.php?id=389
http://www.qss.org/articles/salah/toc.html
