Build a better blacklist

http://www.cyberciti.biz/tips/postfix-spam-filtering-with-blacklists-howto.html

Backups and restores

http://www.howtoforge.com/back_up_restore_harddrives_partitions_with_ghost4linux

Starting out

http://www.lifehacker.com/software/mac/hack-attack-a-guide-for-switching-to-a-mac-224674.php

Overhaul your UI

http://www.interfacelift.com/

Mac emulators

http://www.emuscene.com/

Postfix filtering

http://www.howtoforge.com/linux_spam_filter_mail_gateway

Starting out

http://makethemove.net/

Incompatible hardware

http://www.leenooks.com/

Basic automation

http://www-128.ibm.com/developerworks/aix/library/au-speakingunix6.html