Some pages (eg, image pages) one can just reload, and they're there... no problem. But if one enters information in a form (like a blog, or a comment), try to remember to copy-paste into another document if possible, and if the submit button goes nowhere (as has been happening often today- to me at least...!)- do not press reload/refresh- press Back.
If the information is no longer in the form, copy it from your saved document, and then repost.