Did you know that you can let temporary annotations be faded in when the cursor is moved onto a text link? Thus you can let your visitor know og each link what it is about, before going astray. That's user-friendly and very simple to do - but few people make use of it!
One thing that's rarely used - although it is very simple, and it makes a web site very "inviting" - is, having an attribute TITLE= to your text links. For making a web site "inviting" to your visitors, it should be clear to any link where they will transfer to, before they are clicked. If the link is represented by an image with an attribute ALT=, a "tooltip" will pop up beneath the cursor telling the visitors where that link would bring them to, if clicked. At a text link, though, you need to do that explicitly:
<A href="..." TITLE="... ">The text "..." following the TITLE= will pop up as a tooltip when the cursor is moved over the link.
You think, this is not really useful with a text link? Did you consider that in most cases there will be only limited space for a text link? That you just don't have the space to give your visitors a full explanation? A tooltip pops up only temporarily, here you can give an exhaustive explanation of all the consequences when clicking that link. By pressing the ENTER-key right within the "..." of the TITLE= you can even get a multi-line tooltip.