Even if you're doing the good examples of mantra, but doesn't believe it will happen, then it won't. Put your WILL on it, and believe that it'll happen.

What kind of songs? Well, I usually listen to some music, but the ones that are subliminal. These Subliminal Mp3s/Audio are aids to LDing. Check this out:
http://www.dreamviews.com/community/...ad.php?t=55276

Listen to one of those mp3's that are available before going to sleep, or while doing WBTB. You can do your mantras in while doing so