If you're going to start writing lyrics first, then write the lyrics in it's entire section before you attempt to write a tune or perhaps a chord sequence. And if you produce drum beats on your words, try and refrain from arranging anything until you've finished what you've started out.
This has help me immensely when songwriting.
It's the old principle of keeping things simple. There isn't any point worrying about what the melody for the chorus will sound like if the lyrics for it are only half written. Finish the chorus 'lyrically', then worry about the tune.
This doesn't mean you shouldn't create the melody while writing you're lyrics. That's NOT what I'm saying. I'm talking about 'section-by-section'.
Another example, there's no point starting to write a middle eight - leaving it unfinished, - and then starting a melody for it. You will probably, more often then so, end up back at the drawing board.
Calvin
technorati tags:how, to, write, a, song, learn, songwriting, online, tips