Prayers are always heard and blessed by God. It can be in any form. It has to be sincere, loving and truthful. Just like a mother who is always loving and kind to her children,God who is the mother of this universe is very kind and tries to teach us through our mistakes.
Once upon a time there was an old man, who used to pray God everyday lovingly.
Wherever old age sets in many kinds of worries also shadows us. It so happened that one day due to some other work the old man forgot to pray and thank God for all his blessing. He went to sleep. In his dream he was recollecting his days duties and remembered that he has missed his prayer today. He felt he has committed a big mistake. He cried bitterly to God to excuse him for his mistake. He would not commit this again. The merciful God excused him as he had repented for his mistake and blessed him twice more than usual. All this happened in his dream, which he forgot after waking. A couple of days later some one was waking him up in the morning, saying it was time for prayer. He woke up and asked him who he was and why he cared so much for him. The stranger said he was saturn, and continued further, that a few days back you did not complete your prayer as usual. In your dream you cried and prayed to God and begged him to pardon you. God mercifully blessed you twice. Suppose you keep repeating this again and again, I will be left jobless. Hence I woke you up.
This small story tells us that God is very merciful and will listen to our prayers and bless us, if we pray to him sincerely and truthfully. But this doesn't mean that we make this a habit everyday, because God doesn't like hypocrisy.