How can I contribute?
Simply. Go to Member Area, Register, Log in and use the Submit News link if you want to add your own tip, or comment the existing ones! Anything considered worth to be shown will be published, wint mentioning the author. The Joomla community will thank you for your contribution.
How to restrict a user to access only one component in admin
Sometimes you need to allow a user to access and manage only one (or a few) Joomla! component in the backend. This is quite easy to set up, you need to use cleverly the ACL sytem Joomla has allready in.