Im a bassist Im a songwritter, sometimes its hard to get everything working out the way it should, getting the melodies working with every instrument and writing the lyric as I do most.
If some one have good advices please give me some! Please...

Love can be conquered by great people as well as bad people.. sometimes good might be bad...Love Axl.

the best way is to write the basics of the song yourself, and then get together with your band (if you have one) and just jam a little. usually all the parts fall together then.

I like coming up with words for choruses...just let it flow to you. I've always wanted to write in jibberish...give scat a try! As for the music itself, I have trouble finding riffs that will fit together key-wise. Just wait and keep your self inspired (maybe by doing weird things or going on a walkabout). Hell, a whole song structure came to me while I was taking a shower.

do a computer recording with your voice each part of the melody you have in your head, like lay down the bass track with your voice "ba dum bum bum ba da dum bum bum" and then add in a little geetar that you want to hear "weedly weedly weedly weedly" and then the drums "ksh ksh baddabuddu ksh ksh bum bum ksh ksh" and then get some sort of computer multitracking program like Cool Edit 2 or something and slap them together, show your band your stuff, they may look at you like you're crazy, but when you seperate it and give them time to listen to their part, if they're good at playing by ear, they could figure out exactly what you envision.
As time goes on, start notating it out and figuring it out yourself, you'll come to find that eventually you'll be hearing a song in your head and you can just write the notes out on staff paper and it'll sound exactly like it did in your head.

Alright, a fellow Cool Edit user!!!

Yes! It's the best!
Although now it's called Adobe Audition, it's still the same program we know and love!
I use it alllll the time. It makes me feel warm and fuzzy inside.

I just wish the laptop I used for it wasn't all jacked up, cause then I could multitrack to my heart's desire.