Avoid link text such as "click here"; instead, try to use text that would make sense out of context.
BAD: To get more information click here. In this example, "click here" is meeaningless out of context.
GOOD: Get more information here. In this example, "more information here" could possibly make sense out of context of the paragraph it is in.
GREAT: Get more information on accessibility. The link text here makes sense when out of context with the rest of the page as meaning can be derived from the linked text.
Enter a title for your links in the "Title" field when creating a link.
If you are opening the link in a new window, ensure that you make it clear that the link will open in a new window.
This can be done by repeating the text of the link in the Title field described above and then stating that the link opens in a new window.