Programming

Very concrete and easy-to-follow examples

http://hackmysql.com/documents

and also this one

http://20bits.com/articles/10-tips-for-optimizing-mysql-queries-that-dont-suck/

and

http://www.mysqlperformanceblog.com/

helpful blog post on getting Zend Debugger installed on server

http://paulslinuxbox.net/blog/linux/php-zend-debugger-eclipse

and another:

http://www.thierryb.net/pdtwiki/index.php?title=Using_PDT_:_Installation_:_Installing_the_Zend_Debugger#Installing_Zend_Debugger_client

Since the Aptana SFTP plugin isn't very good, I've switched to this one:

http://www.jcraft.com/eclipse-sftp/

using the eclipse plugin location as:

http://eclipse.jcraft.com/

Amazing time lapse or open source projects - gotta see it to believe it:

http://www.vimeo.com/1130828

I came across this very interesting project:

http://www.dangermouse.net/esoteric/piet/samples.html

Makes for some interesting debuggin I bet :)