So, how do you make sure your prayers are answered?
Go to Church, Temple, or whatever and wherever you call your loving-kind house of worship; and once inside, kneel down, or stand, clasp your hands - and then forget yourself and your own prayers.
Instead, pray for the person, kneeling down or standing in front of you.
In doing so, Heaven will be so astounded with your compassion and unselfish love, that your prayers, even unspoken, will be heard.
In placing the needs of others first, before your own, your Light will shine so bright, that it will become impossible for Heaven not to bless you.