It’s basically a presentation by Yahoo! JavaScript Architect Douglas Crockford – it’s a couple of years old, but it’s all still pretty much accurate.

It’s a must-see for anyone who doesn’t know much about JavaScript, or more importantly, anyone who thinks they know about it and has cast it aside as a “simple scripting language”. ;)

It’s about 2 hours long so it’s a bit of an investment, but it’s been broken up into 4 half-hour-ish videos for your viewing pleasure.

Enjoy:

Part 1, Part 2, Part 3 and Part 4

Steve describes 14 rules that make up a ‘best practices for speeding up your website’: http://developer.yahoo.com/performance/rules.html

And there’s also a way to use the Firefox add-in, Firebug in combination with YSlow to analyse your sites based on the 14 rules: http://www.getfirebug.com/ and http://developer.yahoo.com/yslow/

We’ve been planning a css/js cache for a while now, but never got it off the ground, still seems that a few of the other rules could provide a good return on little investment.