Excellent collection of short tips except for recommending root login! From the article:

The end of October saw the much anticipated release of Ubuntu 8.10 - affectionately called the Intrepid Ibex.
It's a release that sees Ubuntu going from strength to strength.
And with its popularity reaching stratospheric proportions, we thought that now was the perfect time to pool together our favourite tips into one place.
If you've never tried Ubuntu, there's never been a better time to dive in. If you're already a convert, read on to discover how to get the best from your installation.