Since Mike Singletary took over as coach of the Niners in October, he's emphasized five "tenets."
According to this article, Coach Singletary's "49ers Formula for Success'' includes five principles such as "execution," "field position," and "finishing."
To make sure his players are getting the message, "Singletary also is hanging ... banners [with the forumla] around the building. And just before the end of practice, a team employee hauls a large signboard with the five rules onto the field."
By keeping it simple -- five clear principles -- and reiterating it every day at every interaction with his players, Coach Singletary is making it clear what he values and what his players should focus on.