I love point #2 up there, very good.
A little politeness goes a long way, I think. This isn't necessarily etiquette, but more of an "FYI" -- and then, permission, if you feel you need it.
Anyone I work with would be shocked to know my actual rank(s). I try to genuinely start a technique as though I've never seen it before, so I tend to sound like a "new person". It's hard, but I feel there is true value in approaching my learning that way, don't know why.
I can't buy the 5-minute rule unless you're psychic, or a Jedi.