Change the text on the title bar
<title>TEXT HERE</title>

Font Color:
Sample

Change font:
TEXT HERE

Change font size:
TEXT HERE

Center things:
<center>WHATEVER YOU WANT TO CENTER HERE</center>

Add a background:
<body background="URL GOES HERE">

If you want to make your text move like this:
deominic
<marquee>Your text here</marquee>

If you want to make a link like this:
deominic
<a href="URL">Your text</a>

If you want to change font color:
The text you want to be that color

Skip a line like this:
Hi
Welcome to my site

Make your text bold like this:
deominic
Your text here

Make your text italic:
Your text here

Make your text underlined:
deominic
Your text here

Put in a picture somewhere:
<img src="url of the pic">

Strike out text:
~~deominic~~
<s>deominic</s>