emotions
good emotion,bad angry,ect.i think thats when u can wright at ur best,cause ur tellin a story u lived through,look at the brett michals wrote about him and his ex girlfriend,every rose has its thorn,yeah that song was a true story bout how his girl left him.listen too it carefully it may help you to arrange your own.good luck...what i do is i come up with a beat in my head if i like that beat ,i try and put some lyrics behind it,it could be a soft slow tempo beat,or times a fast aggressive beat doesnt matter,thats me though everyone is different.