As potential song titles/story song themes/hook lines occur to me from God-knows-where, I maintain them in a longstanding list that I began to create years ago. 90% of the time, the music comes first -- it just seems easier and more natural for me. Every lyric-first song I've done was as a collaboration with another lyricist -- and in those cases it worked out very well. Music always comes to me while just noodling around on my guitar. I never force it. The chorus music usually comes first, then the verses, then the bridge (if the song needs one). As the song arrangement forms, I find myself 'mouthing' nonsensical words to help fit the meter/syllable count to get the best, natural flow. For some reason, in doing so, the last word of the line seems to naturally take-shape so as to create a rhyme-scheme (if there is a tight scheme). From there, the music tends to suggest a theme to me, and I return to my list to see if there's anything on it that might work. If so, I go from there. If not, I wait until it comes to me. When it does, I write, rewrite and rewrite again. I usually post the lyric only to one of the songwriting forums I've participated in since about 1996. I almost never post the recorded song first. I like critics to focus on the lyric. Some believe it's hard to critique a lyric without the music, and although this can be true, if the lyric is well-written, it should almost flow so well that it sings itself off the page. Everybody writes in their own way. This approach works for me.