CubMaster.org has a online version of the Cub Scout Leader Book at http://cubmaster.org/virtualcubscoutleaderbook.asp. It covers it all from the history of scouting, core values, how to get parents involved, leader training, activity and meeting ideas, etc.
Cubmaster.org and its parent USScouts.org have troves of great detailed ideas, as well as "big picture" information.
One example is the great "PowWow Midway of Topics". A must visit for leaders and active scouting parents.
