Mac Hints & Tips is a killer site that catalogs (of all things) over 6,000 hints, tips, workarounds and other handy pieces of Mac OS X trickery. Compiled from Mac user groups, Apple websites and various other published and unpublished sources around the globe, this highly bookmarkable (and subscribeable) resource is run by one mere mortal by the name of Paul Taylor, who is seeking donations and subscriptions to keep the site and monthly PDF truckin'. Paul currently allows users to sign up for a yearly membership to gain access to the entire database of tips, searchable by keyword or application name, and he also accepts good ol' fashioned donations (though we've all seen how well those go), but he's trying to get the word out to see if the community can toss a few more dollars into the bucket o' hosting bills. To see whether Mac Hints & Tips could be worth your time and a donation or a membership, Paul keeps archives of the past three months available on the main page (in both HTML and PDF), in addition to the current issue.
Check out Mac Hints & Tips, as I know I've found it to be an invaluable resource over the year or so I've been a reader, and it would be great to see such a killer resource get credit where it is most certainly due.