Simple Things to do in HTML
<B>Your Text Here</B> -Will make the "Your Text Here" turn bold.
<U>Your Text Here</U> -Will make the "Your Text Here" underlined.
<Br><br />- Will start a new line.
<a href="linkhere.w/e">Link Name</a> -Is to make new links. add TARGET=_Blank after the extension to open the link up in a new window.
<I>Your Text Here</I> -Makes the "Your Text Here" italic.
Well thats all I can think of for now. If you know any more "basic" ones please add em in the comments.