What are the best ways in front of Allah where ones supplications will surely be answered?
Will all halal and reasonable(Jaiyez) supplications be fulfilled?
Is there any speacial prayer,verbal or physical besides Salat Al Ha`aja, that one can pray and his wordly requirement be fulfilled?

واذاسالک عبادی عنی فانی قریب اجیب دعوة الداع فلیستجبو الی ولیومنو بی لعلھم یرشدون ﴿ سورة البقرہ١٨٦
"Wa iza salaka ibadi anni fainni kharibun ujeebu daawat addaaee iza da aan" (Al-Quran)
"If My servants ask you regarding Me, I am indeed Near. I answer the call of those who call upon Me when they call. So let them answer My call and let them believe in believe in Me–in order that they be truly guided." [Qur’an, 2.186]

"Adab e Dua" is an android application in Urdu Language that How to supplicate to Allah.

Supplication means to ask for something from Allah. Different people have different ways of prayer. If a person gets hurt then they call Allah for help. Allah's will is that the person asking. Allah gives and does not tire. So every person in every difficulty must only pray to Allah.