Two posts on topics of interest to me: landscape photography and black & white photography recently caught my attention on Andrew Gibson’s blog:
To me the second of the two articles is the more interesting. Where the first merely encourages people to consider black and white as an alternative to color for landscapes, the second goes into much more detail about what makes a good black and white landscape photograph covering such topics as how to tell whether a photograph will work in black and white; using patterns, lines, shapes etc.; balance; tones; simplicity. Much of this is also applicable to color photography too, but here the author specifically discusses these issues in the context of black and white photoraphy.
As a bonus there are a number of spectacular black and white photographs in the two posts.