I try to be within 7 rows of an exit and I do count the rows. I don't find the arm waving bit (exits here and here) very useful as the direction is too vague - the card and a quick look around are more useful.
I do watch the life-jacket bit as not all jackets have the same fastenings, although like others here I am not sure of the benefit compared to, say, a smoke hood.
And while we're on the subject of safety - rear facing seats please. The more recent business class seats include rear facing seats and it would be interesting to know how SLF in general feel about them. I believe that rear facing seats are intrinsically safer than forward facing ones and I assume that it is a belief that customers want to face forward that prevent these being a standard fit. When I travel by rail I always try to sit in a rear facing airline type seat - rear facing to stand a chance of recovering quicker (either minutes or days) from a crash and not a table seat as I don't want to be hit by the passenger opposite. Rail passengers seem to be quite happy with rear facing seats so how about it?