I write all my bands lyrics and sing too, whilst playing the bass.
The way I usually do it is I get a phrase and an idea of what I want to say.
I think that's important - even before you have the complete lyric - write down in a sentence or two what it is you want to convey.
Then make everything you write work towards that. This stops you from drifting "off subject".
Sometimes if I can't get a line for every verse I just put spaces and sing lubba-lubba for a bit, get the shape of the song going. Afterwards I'll be riding my bike or on the train and I think of something then that will fit.
Staring at a blank sheet of paper never gives me much inspiration.
Reading books about the subject (or even another subject) can be a good source of non-cliched type words. It's amazing how you can find inspiration in any kind of writing. Novels, newspapers, comics, street signs or instruction manuals - anything! - who knows what can trigger of a good lyric.
A rhyming dictionary can help sometimes, but I tend not to rely too heavily on it, and you have to excerise some judgement, not just use a word because 'it rhymes'. If you can't get a rhyme try switching the words about a bit to get an alternative.
So if you're stuck on the line,
She wore a skirt it was orange..
and can't get a sensible rhyme for "orange"..
try
She had a tight orange skirt
so you can now follow it with
It was so bright it made my eyes hurt
(OK not great, but you get the idea

)
Internal rhymes can be good too: bright/tight.
But don't over-do it I guess.
Avoid cliches!
(this is not my list btw)
Lets take a chance
Your heart is cold
In the morning light
Come back to me
Miss you tonight
Hot-blooded
Cold as ice
Came into my life
Walked in/out of the room
Hold me close
Want you, need you, love you
At the break of dawn
On/over the horizon
Like the stars above
A burning desire
Running to/away
Like a burning fire
Or comparing a relationship to the weather or the sea or mountains or valleys.
If you find yourself writing or singing those things STOP!!!
:scowl:
If I'd be embarrassed to speak a lyric, then I re-write it.
Be prepared to make a good few revisions to the lyrics you write. Even a good "10 minute" lyric needs tweaking here and there.
Having someone else to work with can be helpful, just make sure it's the right person.