Nathan Ingram put together a thorough post on backing up WordPress and a chart comparing various plugins and services.
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.