As we all know there are certain times when duas are more readily accepted especially in Ramadhaan like at Iftari, suhoor and on Laylat -ul Qadr (the Night of Power).
Dua to be recited on Laylatul Qadr
Aisha radhiya Allahu `anha, that she said: O Messenger of Allah! What if I knew which night Laylatul-Qadr was, then what should I say in it? He said.- Say.-
Allahumma innaka affuwwun tuhibbul afwa fafu annee.
O Allah You are The One Who pardons greatly, and loves to pardon, so pardon me..
(Tirmidhi)
We must endeavor to make as many duas as possible and not lose hope if we do not get what we have asked for in this world for Allah will definitely compensate us in the Hereafter.
It has been said that upon seeing the rewards Allah will give in the Hereafter, people will wish that none of their duas had been accepted in this world.
Dua for the deceased
The deceased should be remembered in our duas as the saying goes:
"What comes round goes round"
If today we remember the deceased when our time comes and we are in our graves, Allah will appoint people to remember us.
As another saying goes:
"every little helps"
Those duas could make a big difference in the Hereafter.
May Allah grant us all the taufiq (the ability) to make duas remembering the entire Ummah- the living & the dead frequently throughout our entire lives. Aameen.