The other one I have discovered (the hard way) is if you get an error such as a time out, it pays to go back and check whether the post was successful or not.

I have had 2 errors today while posting. One had gone through but the other hadn't. I find that the best plan in those situations is to use the back button to go back to what I had typed and copy it just in case, so I have the option of pasting later rather than typing in again before trying to view the thread.

Jon