very good start, I would only suggest indenting like so:
Code:
<html>
<head>
<link rel="stylesheet" href="format.css" />
<title> A Hope Page About Football Teams.</title>
</head>
<body>
<h1>Football Homepage</h1>
<p>
These are my <strong>favorite Football</strong> Teams:
</p>
<ol style="font-weight:bold;">
<li>Watford</li>
<li>Liverpool</li>
<li>England</li>
</ol>
</body>
</html>
Also, take note that <strong> and <b> look the same but <b> uses the mark-up to make the text bold, while <strong> uses cascading methods (like CSS). CSS is faster and better prepared for things like this. So I advise always to use the <strong> tags in place of <b>.
You can also set the style directly to some tags like I did here:
Code:
<ol style="font-weight:bold;">
Also, child elements take the default of their parents. What I mean is, the (<li>)
child tags will inherit their (<ol>)
parent's style. So everything between the <ol> tags are now bold ;)
And don't forget to close those tags :P