It's not actually a tip, it's just a nice cool idea that will make every login a bit special. Go to http://www.filewatcher.org and search for the keyword "fortune". Download the version that applies to your system (tar.gz or rpm) and install it. Locate where the ELF executable fortune has been placed (usually /usr/games) and then load the file /etc/profile on your editor and add the following last line to the file: /usr/games/fortune (or the path where fortune resides). This will cause a random "fortune cookie" (a quote) to appear every time a user logs in. Alternatively, you can place that line in an independent user's ~/.profile so only he will have this feature enabled.