How to insert line breaks in HTML documents using CSS

It’d be best to wrap all of your elements in label elements, then apply css to the labels. The :before and :after pseudo classes are not completely supported in a consistent way.

Label tags have a lot of advantages including increased accessibility (on multiple levels) and more.

<label>
    Thingy one: <input type="text" name="one">;
</label>

then use CSS on your label elements…

label {display:block;clear:both;}