I have a few links you might find interesting today.
First off, The Writer Diaries, the awesome blog I am part of, is giving away a query + first 10 page crit. This is the chance to get several great pairs of eyes over your work, so go here and enter.
Secondly we are discussing the worst/best writing advice you've ever been given. Would love to hear your thoughts here. What intrigues me about this discussion is that I think it shows that not all advice fits everyone. What works for one doesn't work for another, you know? It's about finding your own path.
And third, Simon has written an incredibly useful post on UK vs. US cover letters here (which is the difference between a UK Cover and a US Query letter. If you are thinking of querying in both countries, read it. If you are UK based and all you find is US based advice, read it. I found it a very useful summary. Obviously, you have to check the instructions with the agent you are querying, but I think it's helpful.
Also, as a UK person, when I first saw all these online contests I did notice how it is often US style querying to enter, which as somebody writing UK cover letters threw me.
I hope you find those useful!