T h i s   is   w ha t    t h e <P R E > 
tag   p r o duce s  in  m y  co l our   s c hem e

The first tag we're going to look at is the <H#> tag. H stands for Header and # can be any number from 1 to 6. Let me demonstrate:
<H1>This is a level-1 header</H1>

This is a level-1 header

<H2 ALIGN="center">This is a level-2 header aligned in the center</H2>

This is a level-2 header aligned in the center

<H3 ALIGN="right">This is a level-3 header aligned right</H3>

This is a level-3 header aligned right

<H4>This is a level-4 header</H4>

This is a level-4 header

<H5>This is a level-5 header</H5>

This is a level-5 header

<H6>This is a level-6 header</H6>

This is a level-6 header

Note that if you want to A NAME your header [see Anchor tag section], you MUST place the <A NAME="headername"> tag after the <H#> tag and the </A> tag before the </H#> tag. Also, see all that blank space? I didn't do it [I swear! :)]. As soon as you start a header, it automagically leaves two blank spaces above and below itself.

Okay, so how do you align a block of text on the page in a way other than `left'? You know that you cannot just TAB over [there was a TAB tag in development, but they canned it for some strange reason], so what do you do?
Let's start with the easy stuff. The easiest alignment is that in the center:
<CENTER>This text is centered</CENTER>
This text is centered Note that as soon as you close the CENTER tag, it automatically breaks the line for you. This tag is being pushed out by the much more user-friendly <P ALIGN="center">, which defines a new paragraph aligned in the center - it automagically breaks two lines and when you close it [<P>] it breaks another two lines, so subsequent text starts two lines after it:
<P ALIGN="center">This is user-friendly centered text</P>

This is user-friendly centered text

See? You can also use the <P> tag to align things on the right:
<P ALIGN="right">This text is aligned right</P>

This text is aligned right

P can also justify text for you:
<P ALIGN="justify">This text is justified</P>

This text is justified. Boy, it's so justified. I know it doesn't look like that yet, but if I type some more in here, at least three lines then you'll see that it is, in fact justified. Do not try and bend the spoon. That's impossible. Instead, only try to realize the truth.

...or you can leave it alone and simply open it with <P> and close it with </P> and it will default to the left. Neat, huh?
There is another way to align blocks of text on a page. It's called DIV and it's the block-level equivalent of SPAN, only DIV is more powerful - it can include other SPAN tags, or other DIV tags, or P tags, or even TABLEs. I make extensive use of DIV [because it only causes one line break instead of two, unlike P], but be warned! WebTV doesn't understand DIV. Here are examples of DIV at work:
<DIV ALIGN="left">This text is aligned left</DIV>
<DIV ALIGN="center">This text is aligned in the center</DIV>
<DIV ALIGN="right">This text is aligned right</DIV>
<DIV ALIGN="justify">This text is justified</DIV>

See? If you view the source for this page, you will see that I had to include a BR tag before I started typing this comment, because DIV only breaks one line.

Now let's talk about block-level quotations. The tag used in these is BLOCKQUOTE and you should use it whenever you're citing a source and your citation is more than 4 lines in length. Or you can use it to simulate a TAB effect :) See for yourself:
<BLOCKQUOTE>This is a block quotation</BLOCKQUOTE>

This is a block quotation. I suppose I should type a whole bunch of words here so you can see what it looks like when you use more than the standard `this is that' thing. Blah, blah. The truth is out there. Follow the white rabbit. Blah, blah. Okay, this should be enough

Note that I did not use any line breaks - as soon as you `activate' BLOCKQUOTE, it automagically breaks two lines, `tabs' over twice and justifies. As soon as you close the tag, it breaks two lines again and returns you to your previous positioning in the document. The beauty of it all is that you can use BLOCKQUOTE within BLOCKQUOTE within BLOCKQUOTE. However, if you use it for things other than long citations, you may confuse your blind visitors, who will think it is a long citation because that is its function. Also note that BLOCKQUOTE cannot be used if you are in a paragraph [don't ask me why]
...and so on up to SIZE 8. Well, let's learn about lists now. No, you can't make vertical rules. It would be nice though :).