For example:  http://www.sitename.com/default.aspx?contents=1

1)     Open the parent site in SPD

2)     On the ‘Site’ menu, select ‘Navigation’ (this should open a treeview
showing your top link bar and quick launch for the site)

3)     Locate the quick launch, and the heading you want to create the link
under (Sites maybe?)

4)     Right-click on the heading entry, select New->Page (this will create
a new child node under the heading you selected)

5)     Double click on the new node to open the page (you need to do this in
order to edit the node, you won’t actually modify the new page, you can
delete it after you are done)

6)     Click on the ‘Web Site’ tab to go back to the navigation view

7)     Right-click on the new node, click ‘Properties’

8)     In the dialog box, find the site you want to create the link to,
select it and click OK

9)     The link is created and is now security aware. You can change the
name of the link in SPD (right-click the node and select ‘Rename’ or in IE)

• An exception of type System.InvalidOperationException was thrown.  Additional exception information: Cannot start service SPTimerV3 on computer ‘.’
• The Windows SharePoint Services Timer Service has an incorrect login information
• Has a password changed for the particular login being used?

This error has happened to me a couple of times — and always AFTER and update, upgrade (of a dependent product like SQL Server, etc.) or a Windows Update.    For some reason, updates sometimes blank out the password of the service user accounts.

Easy enough to fix . . . just re-enter the password into the appropriate accounts used for the services (like Timer, Content, etc.).  Then just re-start the services and do an IISReset/noforce.  Should be all set!