Great interactive demo to teach the basics of photography. Move the controls to see exactly what the difference between f1.8 and f11 is.

Long and detailed guide to creating Wordpress themes from scratch. Has a Windows bias in places but to be honest I've not worked through it as I have no personal desire to create a theme from scratch. If you're not prepared / able to pay someone this could be the answer.

A 70 minute screencast into to Unix. $9. To investigate

Two years on this B3ta investigation appears to be doing the rounds again. It's a good one too - investigating the various "expert" ways of poaching eggs and discovering the cling-film technique is the best.

I seem to be hacking my .htaccess file a lot these days and usually get stumped over something that turns out to be stupidly simple. This comprehensive (and comprehendable, to me anyway) tutorial looks to be rather essential in this regard.