The Line

[milo]

And if it isn't free verse? With meter and rhyme: then, are there different line break rules? Can I break in the middle of an iamb/trochee etc? Or.. should I stick with a precise pattern?

There are different rules for line breaks with rhyme and meter but the concepts are the same. Rhyme and meter actually increase the emphasis on the last word in a line making the line break even more important. There are other rules regarding catalexis and feminine endings, post some example lines and we can walk through them.