Last year a friend taught me about the bash trick "CTRL-R" <start typing 'ssh' or some other previously run command> on the command line for reverse history searching, and it is an amazing time saver. It acts as a great alternative to #8, "Find the last command that begins with “whatever,” but avoid running it"
If by reverse you mean going forward instead of backwards, that should be done with Ctrl-S; it does not work in Bash though, since Ctrl-S locks the scrolling of the terminal. I believe this behavior can be overridden, through some .xinputrc settings perhaps, but I haven't still found enough motivation to look it up!
When I need to do number one -- add sudo to the previous command -- I just use the up arrow, Ctrl-a to get to the beginning of the line, and add sudo. It's a little slower than the method in the article, but I find it downright dangerous to have something in your command history that means "do whatever was typed previously as root".
Couple of little nits - 5. and 8. are not bash specific and neither are event designators, these work fine in tcsh and zsh. I think caret substitution might have actually come from the *csh world. Not that big of a deal since bash is so prevalent these days but hey, a pedantipoint is a pedantipoint.