What is a Good hyperlink?

A good text link needs to be surrounded by other keywords and to be clearly visible for the reader. From SEO point of view it is important to have a good anchor text pointing to somebody`s website. This is how a website gets a vote from you for a specific keyword phrase.

For eg. "For excellent examples of good photoshop tutorials hypertext look no further than teachtutorials.com, online photoshop tutorials resource"

Also, which URL do you think it is correct?

http://www.mysite.com
http://www.mysite.com/
http://www.mysite.com/index
http://www.mysite.com/index.html
http://mysite.com
http://mysite.com/
http://mysite.com/index
http://mysite.com/index.html

Let`s have a talk about it.