Shankar Ganesh has list of 11 things to do before hitting the “Publish” button on your blog. I do almost all of those and I think all are necessary, but most important I find:

* Read your post again. This, in my opinion is the most important thing you must do before publishing your post. Beside the fact that you get to check all those grammar and punctuation mistakes, you can see if your post makes sense and/or it easy to read and understand by your readers.

* Check if links work. Check if all your links work, especially those leading to something important for the understanding of the post.

* Tag posts. If you’re using tags plugins, like Ultimate Tag Warrior, and you’d better be using it, don’t forget to tag your posts.

* Link to source. Don’t forget to give a link to your source. This is good because your readers will see that you’re not just copying content from somewhere, plus that this way it’s more likely for you to get some incoming links from the source you’re linking to.

* Link to your own posts. This is not a “must do”, but it is very good if you can, to place some links to your own older posts, with content relevant to what you’re writing about. Your readers will read more plus that it’s good for your SEO.

Mark Ghosh from Weblog Tools Collection adds some “to do” things before you publish your post and most important I find “sleep on your posts“. Sometimes, not all the time, letting some time past between writing and publishing your post can be very good, because you get the chance to see if things really are the way you presented it and maybe make some corrections or additions.