Perhaps this goes beyond "introduction", but I sometimes find it useful to put <p> marks inside <li> marks if the list items are full sentences that might span lines. For example:

<ul>

<li><p>The quick brown fox jumped over the lazy dog and then jumped ba
+ck again once or twice, which really annoyed the dog.</p></li>

<li><p>Another paragraph of long text which has no point but to show o
+ff how list paragraphs look when composed of a long sentence that mig
+ht span several lines on the screen and having a little extra white s
+pace would be a kindness</p></li>

</ul>
[download]

Result:

• The quick brown fox jumped over the lazy dog and then jumped back again once or twice, which really annoyed the dog.

• Another paragraph of long text which has no point but to show off how list paragraphs look when composed of a long sentence that might span several lines on the screen and having a little extra white space would be a kindness