I.B.H.Q.

To add a link to to your blog, copy the address that you want to link to of the site, (the http://www bit) then think where in your text you want to add it, then click on 'Link' in your Tools options on the right-hand side of the Main entry text box and, hey presto, up will jump a box to which you should add your links address details.

That's it. Simple.