The Digital Photography School is an excellent ever expanding collection of pointers, notes, techniques etc, for photographers. For example, here’s a screen shot showing some of the information under the Tips & Techniques tab. There are many other tabs, as can be seen from the above screen shot.
Each article is quite short but full of useful information. Here is one example, an article by Anne McKinnell, a clip of which is below:If you’ve got a few minutes, why not hop over to dPS and see what you can find.