Leave blank lines between paragraphs.
+<h1>test h1</h1>
+<p>paragraph1. yay and so on.</p>
+<p>paragraph 2. etc. etc.</p>
+<hr>
+<p>did you see hr?</p>
+
You can \**emphasise*\* or \*\***strongly emphasise**\*\* text by placing it
in single or double asterisks.