According to the Abrahamic faiths (Judaism, Christianity, Islam) to ask the God of the Bible for anything in prayer is pointless.
- God is omnipotent. He already knows everything about you and what you truly need. He knows past, present, and future.
- God has everything already planned out. To ask God for anything to goes contrary to the plan will not be granted. He will not change his mind for you.
Even prayers of praise and thanks are rather pointless. God already knows if you are grateful for what he does and He already knows He is the best God, ever. Just ask Him. He won't answer. He doesn't have to.