Wikileaks, though technically not a wiki, provides an easy means to disseminate information that some find it desirable to share against the wishes of those who find it desirable to keep secret. Aside from the morality of the leaking itself, such a service provides a look into the activities of...
Don't always go for the obvious colour. Sometimes, it's better to think first.
Take as much time as you want - there's no limit.
Look for squares on their own, for these are the toughest to clear and should be a priority.