TL;DR: Too long... make it shorter

"Make it shorter" is one of my favorite pieces of advice. 

Even if we weren't living in the attention economy, there are mostly only benefits from making "it" shorter. It being the memo, the meeting, the film, the book, the deck. I've rarely had someone tell me something was too brief. Just that they wanted more of it.

Shorter doesn't mean less content. It means more precision. More sophistication. And hence more power.