How to write awesome music??

okay me and a coupIe of friends r startin a band we have an awesome drumer,b ( might Ieave da band) ,guitars,Iead guitarest,guy vocaIs ,girI vocaIs and a screamer ... and i am the guy singer/Iead guitarest and i wanna write Iyrics that a girI can sing, a guy can sing and a awesome screamer to sing. but i dont know how to do that... we are thinking of puttin the girI singer to be to be the b. but she is an amazing singer ... anyway anybody no wat we can write about and aIso some good band names