The National Lawyers Guild, which is providing legal support to protesters in Ferguson and elsewhere
25 Activities Black People Should Avoid Around Cops: "Don't . . . and maybe they won't kill you."
Ferguson Action, with links to rallies around the country
Tips for Planning A Non-Violent Civil Disobedience Against Police Brutality (disclaimer: this seems sensible and thorough to me, but I've no experience to measure it against)
12 things white people can do now because Ferguson (lots of links to history, context)
. . . there's more, but I am taking two small children on a plane tomorrow and it is irresponsible of me to be awake right now.