For very short talks, your greatest challenge will be to weed
out relentlessly any extraneous subject matter. Any tables or
figures or equations that don’t contribute specifically to the one
or two points you’re making must go, no matter how interesting
they may be in their own right. Sometimes it seems as if
speakers fear their main agenda isn’t very interesting, so they
desperately try to prop up their talks with diverting little
sidelights. Unfortunately, the effect is to distract the audience
and make the talk disorganized.