php query_posts line breaks needed ?

Following my previous resolved post
http://wordpress.org/support/topic/retrieving-each-categories-post-list-to-main-website?replies=11
I am left with a glitch or two. I wonder if someone can help.

Having successfully retrieved the posts/categories required, I notice a line break is needed after each post title. Currently it looks like this:

Title one Title
two Title three
Title four Title
five

Is it possible to force each title onto a separate line ?

Next I wish to try retrieving the thumbnails and limit their width.