Helping DebianRegarding Lucas' points that he makes about helping debian, I think there is an important factor for people that was only mentioned between the lines: "Instant Gratification". It is much more gratifying for a contributor if his effords have immediate effects. (I guess that is one reason for the success of Wikis.) Things that slow down the effect usually dimish this gratification.
So what can people who want to help Debian do to achive more imminent gratification? Pick projects that let you help directly with direct svn/git/whatnot access (Security team, Debian Edu, Debian-Installer...).
On the other hand we should try to come up with ways to cut down on delays as much as possible and make it easier to rollback and repair if an error occures. (That is almost allways a good thing anyways.)