Music: Noodling around occasionally produces keepers. I then try to expand those keepers and maybe string together a few keepers that occurred independently.

Lyrics: Sometimes, a phrase strikes me as a potential title or lyric line, but I've never been able to write a full set of lyrics without ruining them.

Since I practically don't write lyrics, matching lyrics and music is a non-existent issue for me.

i usually tend to write my lyrics based on events that happen to me during the week and try to put in a different type of setting, but keep the overall value or point of it intact

i don't know. it (i.e., the music and the lyrics) just kind of come all at once and it's done real quick. i don't every work on things. i'm not saying that working on songs is futile or stupid, it's just not the way i work. if i work on something, especially the harder i work, the shittier it is. so, i just sit and start strumming and singing and sometimes a good one squeezes out. i don't worry about it.

www.myspace.com/mancband

It goes both ways for me. Sometimes lyrics just leap into my head based on a reaction to something and I always keep a pen & paper handy unless I'm working (I drive a truck) in that case I have a microcassette recorder to catch ideas.
Other times it's from noodling around. I try to set some practice time aside each day for noodling just to see what comes out...some days the well is dry, some days I can't record stuff fast enough. If I'm lucky I can match something I've recorded to any lyrics I have jotted down but I don't try to force the two together...if the vibe of the riff doesn't match the words I let it go.
My band buddies love that I have alot of ideas but sometimes they call me "overkill" because I come to a practice with a CD chock full of stuff.

I often hear riffs and melodies in my head when I am away from my guitar then I pick up my guitar and work it out. One thing I have found helpful is to always record everything. As far as lyrics go,I really suck at them