april fools day has motivated me to be active on forums. Try to aim for trimming down your output to that amount. Bohemian Rhapsody is allowed, and it references mental problems/death, so this song should be allowed.
This will act as a kind of strainer-you won't be able to remember the less effective bits, and you'll have to fill in stronger material for what you can't remember. If you're having trouble figuring out what works and what doesn't, try to rewrite the song from memory, without looking at it. As you're writing, let everything that wants to come out come out, but then you'll need to scale it back to a workable and efficient set of lyrics.
Bob Dylan's first draft of 'Like a Rolling Stone' was 20 pages long and terrible. Unless you're a world-class rapper who makes magic every time straight off the dome, your first draft of a song won't necessarily be the best.