Sometimes I wish I could delete a post ;^)

I make a lot of typos ~ I'm a much worse typist than I was when I was younger ~ and so I almost always use "Preview." I can proofread myself more effectively in preview-mode than in the message-writing box. I don't know if it's the font change or what, but it works for me.

As mentioned more than once above, "preview" is also essential to test links, and to make sure you turned italics off after turning them on.

I don't often write a message and then think better of it. Once I write something, it's almost always getting submitted unless the site goes down. I've never regretted a submission because I thought it may have offended someone else; the posts I have regretted are the ones where I've embarrassed myself (e.g., asserted something and then been proved wrong).

Occasionally, I'll write a short one- or two-sentence post and submit without previewing. Invariably, there's a typo. I can't not preview!