10.6: Make a temporary Administrator account
My department runs a large enterprise level network of managed Macs in a rapidly growing school district. We use a software deployment solution to push out all district software and we use Workgroup Manager to effectively manage user environments. Like most enterprise-level networks, nearly all of our staff users are non-admin users with mobile accounts. Rarely there are times when our users need to be an admin user for a limited amount of time: (to install print drivers for odd-ball home printers, joining an unusual secure wireless network, running an obscure web conferencing app, etc.). It's easy to make a mobile user an administrator through System Preferences, but it's not so easy to remember to remove the admin privileges. While you can set a calendar reminder, invariably the user is offline when your reminder pops up and then a day, o ... 
Source: http://feeds.macosxhints.com/click.phdo?i=42c72fa747ee9768240fce58a18644d3
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