Bootstrap Skeleton
This is a simple Bootstrap skeleton. You can fork it to get a ready to use Bootstrap fiddle.
HTML
<script src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.0.1/bootstrap.min.js"></script>
<form class="form-horizontal">
<div class="control-group">
<label for="prependedInput" class="control-label">Prepended text</label>
<div class="controls">
<p class="help-block">Here's some help text</p>
<div class="input-prepend">
<input type="text" class="span2" id="prependedInput" size="16">
</div>
</div>
</div>
</form>
CSS
@import url('http://twitter.github.com/bootstrap/assets/css/bootstrap.css');
.form-horizontal .help-block {
margin: 0px 0px 9px 0px;
}