PC Magazine has hundreds of tips that are searchable on their site. If you visit the main tips page, you’ll see the most current tip. If you scroll almost to the bottom, you’ll see categories (operating systems, applications, browsers, hardware) that you can browse. You can also search by keywords.
For instance, I did a search for ALT TAB and there were 21 results. The first result was from Nov 5/02 called A Customized Alt-Tab which talks about a utility that replaced the standard Alt-Tab keyboard shortcut to switch between applications. The second result was from Apr 22/03 called Using the Alt Tab that explains simply that this keyboard shortcut exists.