Fanfic titles? Mmmhmm...titling is horrible, yes it is. My biggest writing obstacle aside from clothes and - in some cases - character names. xP There's not much advise I can give without knowing the contents of the fic (and to be honest, I think only the author will really be able to tell what title is just right), but a couple of words to avoid include 'champion', 'chronicles', 'darkness', 'destiny', 'legend'/'legendary', 'master', 'prodigy', 'quest', 'shadow'. 'ultimate', 'journey' and names of legendary pokemon; all of those are horribly overused. .__. (so obviously we don't go with something like "Legend of Shadow Mew: the Master Trainer's Ultimate Journey' xD) One thing that might help, though, is to go through a thesaurus and look up all kinds of words associated to the contents of your story and see if anything strikes your fancy. I sort of had a reverse of this with my fic-in-the-works; it was a certain word I wanted to check the meaning of, only to find - much to my joy - that it was precisely the meaning I wanted my title to convey. Sometimes you just get lucky. xD
Anyway, No Day But Today has a nice ring to it, though I can't judge how accurate it is without a story to peg it to. (That would be sort of like evaluating the name of a painting without looking at the painting) Like Hanako said, trying a name out for a while helps in deciding, though. ^^