Method of Salaah

Q: If during the recitation of Durood-e-Ebrahim, someone mistakenly says "majit" instead of "majid", does it invalidate his prayer?

Q: What is the meaning of khushoo and khuzoo in salaah and how do we attain khushoo and khuzoo?

Q: What is an easy way to acquire concentration in salaah? When I start offering salaah, then mundane affairs and other things come into my  mind and distract me. 

Q: How many times is it prescribed to send blessings to the Holy Prophet Muhammad (sallallahu alaihi wasallam) in a salat and when?

Q: What is the correct way of reciting solatul-ibrahim?

Q: I recite dua in jalsah (sitting between 2 sajdahs) as per hadith "Allahum magfirli warhamni wajburni warfaani wahdini wa aafini warzuqni". I like to add these words to this dua "wa aauzu bika min kulli balaa id-duniya wa azaabil aakhirah".

I would like to know if adding these words in the dua is permissible or not? 

Q: Should we recite At-tahiyat and Durood e Ibrahim with Tajweed? With Ghunna and everything?

Q: If due to sensitivity, the microphone picks up the Imam's voice in the 3rd and 4th rakaat of Zuhr, Asr, Esha and in the 3rd rakaat of Maghrib, does that count as having made Qiraat in a loud voice? Is Sajdah Sahw wajib? Please note that the Imam is not intentionally doing so... He is keeping the voice low but the mic picks it up.

Q: How loud can a person recite Quraan in salaah like in a fardh or sunnah salaah? How loud should a person recite when he is performing salaah individually in his room, etc. in a jehri or sirrri salaah? 

Q: Is saying Aameen after Surah Fatiha in namaz correct? Someone had written that saying Aameen invalidates the salaah.