Rob Tarr ran some benchmarks to prove the claim that chaining jQuery selector methods is faster than placing them all in a single method call.
Dave Clements has a great suggestion for adding snippets to a WordPress site in a way that will preserve them between theme changes: create a simple functionality plugin.
Using “click here” as anchor text is considered a bad practice because it doesn’t tell the user what the link will direct them to by itself, without users having to read the surrounding text; because “clicking” is irrelevant in many situations (assistive devices, smartphones, etc); and because it is meaningless to search engines indexing the page.
TJ Stein gave a really good presentation at WordCamp Chicago 2011 about scaling and performance issues with WordPress installations. He focuses a lot on using ngnix instead of Apache, but also covers PHP object caching, Varnish, CDNs, benchmarking, etc. It’s a good overview of current practices, but there’s also a lot of specific tips throughout.
D Bnonn Tennant makes a good case for using larger font sizes, although I would probably vote for 14 pixels instead of 16. And of course it should be set in em’s instead of pixels.
This Fiddle shows how to pass extra parameters to an event handler function in jQuery.