Again, simple, but often overlooked or misconstrued. Don't sell it, that's not FREEDOM either, it's supporting prohibition. Get your friends and family stoned off their collective faces, use you harvest to convert others into growing their own.
Share your knowledge, teach your parents, teach your children, teach total strangers. Don't be tight with free marijuana once you've got the harvest, spread the word. Don't buy weed, plant a seed, end the greed, fill the need.
Plant seeds where ever you go, if marijuana goes feral, well, it really goes feral. (And regardless of the ecological consequences I can't see a lot of Greenies getting upset about this).