Zikr & Dua

Q: Can we recite only istighfaar during periods or tell me any recitation which is allowed during period days?

Q: Is it advisable to say "thumma ameen". Is there any significance in saying thumma with Aameen?

Q: Is there any masnoon du'ah to read before mashwara? People says to read اللهم الهمنا مراشد امورنا...

Q: I wanted to know that must every Muslim speak in Arabic or make dua only in Arabic. I read Qur'an in English transliteration of Arabic, so is it right to do or not?

Q: If I do not touch the Arabic text, is it permissible to read from Munaajaat-e-Maqbool without wudhu?

Q: My question is that what is the translation of the following dua:  SUBHANALLAH-E-WABEHAMDEHI SUBHANALLAH-E-ALAZEEM WABEHAMDEHI ASTAGHFERULLAH"

Also is it a good dua to read on a daily basis?

Q: Can a person make due and beg for Allah Ta'ala to gorgive them in English or does it have to be in Arabic?

Q: I want to know what is the significance of Manzil?

Q: I have learnt the dua' said at the end of a gathering ("subhanakallahumma wa bihamdika ashhadu...") which compensates for vain talk etc in the gathering. My question is, can this dua also be said in the end of a telephone conversation? Since often much vain talk and possible backbiting etc goes on in telephone conversations. If so, is it OK if I say the dua after having closed the phone at the end of the conversation (rather than saying it whilst still in conversation) in order to not appear weird/strange (since the person I speak with might not understand)?

Q: Please could you advise if making dua for a long life is allowed in Islam? What is the ayat to be read from the Quran that saves you from death for that day?