Editing should always be a part of your content creation efforts.
Craig Cardimon shared this gem by Danielle Klahr. I can say that this is pretty much the method that I use when writing my content–especially for my blog entries. Editing is always crucial! I don’t know how many times I review and edit my blog posts before I actually post them, and yes, as she says, sometimes I still find mistakes after I’ve reviewed it dozens of times.
There are some good, basic pointers here worth reviewing.