You would like to have a site admin link to be able to edit your web site from any browser.
Log into the Joomla backend as administrator:
You will need to create a menu or add to an existing menu - the menu will contain the following:
Site admin (user>>login...default user layout)
Submit article (Articles>>Articles/Forms...Article submission layout - Access level "Registered")
Logout (Type: External link - Access level "Registered", In the "Link" textbox type the following: "index.php?option=com_user&task=logout&return=Lw")
Update: The "logout" menu does NOT work in Joomla 2.5 - Instead point the "logout" in the menu to the following: