We enjoy reading and participating in the blog Daily Writing Tips: http://www.dailywritingtips.com/.
Sometimes humorous, sometimes serious, sometimes controversial--always interesting. The blog author often has good advice for writers, and we throw our two cents into the discussions from time to time. (You just have to be patient to skip over all the messages from folks who are looking for English classes and English teachers.)
Just a note: Those who register with the Precise Edit website also receive occasional writing tips and strategies, as well as the ability to post messages in these forums (hint hint). However, this blog is worth checking out from time to time to see what information is useful to you.
Do you have a good resource to share? Please post it here so we may all benefit from your advice.