It's pretty much always worked for me. And I'm not joking about that. Every time I've been led to pray for something, genuinely seeking help and an answer, I've gotten it in some form. And this has been a completely consistent thing, starting before I even became Christian, while I was a Christian, and now even long after I stopped officially considering myself affiliated with the Christian church.
It's always just about taking that time, stopping everything, turning off the noise of the world, and talking about my problems with God. (Or whoever it is that I talk to in that place of deep concentration. I've always called Him "God," and felt like He was the same God of the Bible, so I still assume that, even though I've gotten more into a kind of multi-religious mindset recently where I don't really believe in the exclusionary doctrines anymore.)