How do I come up with titles? Easy. I just whine at my beta reader until she does it for me. Sometimes I use lyrics. Other times I beat myself around the head until something falls out.

Other than that I often have a metaphor running through my fic and look for quotes related to that metaphor and use bits of those (The Power of Grace comes from this couplet: Who hath not own'd, with rapture-smitten frame, The power of grace, the magic of a name..

And if all else fails I use a translator to turn something into Latin and then it looks good, even if it's a pile of rubbish.