Are you leaving the right things out?
(He's expected to veto a controversial ultrasound bill.)
Hyundai left out the price on advertisements for its 2011 Sonata.
(You can request an e-mail, but you have to include your phone number and yes, they will be calling you.)
A friend of mine in sales left off his resume the position he held for more than a year as the National Sales Director for a growing technology provider.
(It went bankrupt and he returned to his previous employer.)
Steve Jobs left out the part of his talk about how easily the iPhone 4 connects to the internet.
(Too many bloggers in the audience were eating up the bandwidth of the local wi-fi.)
The main thing to keep in mind about what to leave out in your presentation, resume, business plan or other communication is not what you want to leave out, but what your audience expects you to leave out (or in). That will be noticeable in its absence.