To add a nice touch right off the bat for an item, the font is a great place to start. Personally, I like Courier the best, but I suppose all have a preference. To change the font and make an item feel a little more personal, the {font:} tag is used. By placing the name of the font after the colon, you instantly change the font. So...
{font:verdana}This is Verdana.{/font}
will give you
This is Verdana.
Pretty nifty, right? The {/font} tag at the end will stop that font so that you can either A) Do nothing and revert back to the usual Arial or B) Use another {font:} tag to switch to any other font. (Why would you ever use two fonts in a poem or story? Well, if you choose to add a Writer's Note at the end, it makes it clear that it is not part of the poem/story... Also, say you have a letter within your story, It can be set apart from the narrative easily by changing the font.).

{i}My name is Stephanie{/i}, she thought.
My name is Stephanie, she thought.
Italicization is a great tool for showing internal dialogue within a story or poem or for adding emphasis to a word or phrase.

I will {b}not{/b} bow to you!
I will not bow to you!
Having text in bold is another great way to show emphasis in writing –and always looks so much better than capitalizing a whole word... capitalizing like that can too often be confused as meaning the word is an acronym.

Grace, Stephanie {u}Noticing Newbies Newsletter{/u}, pp. 3-5
Grace, Stephanie Noticing Newbies Newsletter, pp. 3-5
Another great way to add some emphasis or stress to a word or phrase but, more than that, to be more grammar-efficient, titles of books and such should be underlined, so this is a must for anyone giving credit or research information. Even if you're not writing a bibliography, titles should still be underlined (either that or my English teachers in school just liked driving me crazy since, for some reason, I just can not make a straight line!).

We walked {x}walked{/x} around.
We walked walked around.
While this is very useful for making jokes or being sarcastic (You mean you're still reading this? Thanks for sticking with me!), it is most useful in reviewing. It is a great way to point out that a word should be omitted or is spelled incorrectly. There are few cases where you'd use this in a poem or story, but that's not to say that you shouldn't. I've seen it done.

10{super}100{/super}
10¹⁰⁰
Okay, so I associate this with math, but it's also useful for if you're adding notes. We've all seen it... I am unwell¹. Then, at the end of the page or book, you'll see ¹ Unwell means crazy.
I'm sure there are more uses for superscript, but I don't use it very often, so you'll have to find out it's appeal on your own. In poetry, it can be a nice touch if you're going for a certain format or look (As in a concrete or shaped poem).

We went {sub}down{/sub} the hill.
We went _down the hill.
This is another one that I usually use for jokes or being sarcastic. (You're back already? _{And here I was enjoying the silence.}) Again, not something that I really use so, if you've read the superscript, you've got my thoughts for subscript already.

{c:red}This{/c} {c:orange}will{/c} {c:yellow}make{/c} {c:green}my{/c} {c:blue}words{/c} {c:indigo}a{/c} {c:violet}rainbow{/c}.
This will make my words a rainbow.
There are many other color choices, but I think listing them all here would be kind of obnoxious. At the end of this newsletter, I'll be adding instructions for how to get more information about WritingML, so you'll find the choices there. Now, I'm sure it's obvious how this is useful in different ways –especially just to add a more personal touch and a lot more visual appeal, but you must be careful. Some font and color combinations will make things hard to read. When it comes to colors like yellow, there really isn't a good font choice, you're going to get complaints about a strain on the readers' eyes. Always make sure you test the waters and preview your item if you're going to use color.
Additionally, if you add more that one color in the {c:} tag, the color of the word(s) between the tags will change every time the page is refreshed.
{c:red,orange,yellow}Go ahead, refresh.{/c}
Go ahead, refresh

{size:1}One.{/size} {size:2}Two.{/size} {size:3}Three.{/size} {size:4}Four.{/size} {size:5}Five.{/size}.
One. Two. Three. Four. Five.
As you can see, the bigger the number, the bigger the text. This is useful for separating your title from narrative, making things stand out, formatting a poem, or just making things easier to read if you forget your glasses.

{indent}I am indented.
I am not indented.
         I am indented.
An indent is five spaces. As we were all taught in school, you should always indent at the beginning of a paragraph. Usually, when it comes to the computer or text online, a line is skipped between paragraphs and indentation is not used. Personally, I like a skipped line and an indent. It just makes everything look good. (By the way: Always skip a line between paragraphs! Without that, everything always looks very “smushed”.).
Since indentation is always incredibly useful for formatting a poem or text in other items, I also want to make sure that you're aware that you can add multiple indents with one tag by adding a colon and a number.
{indent:3}I am indented thrice.
I am not indented.
                             I am indented thrice.
The highest you can go is 10.