People are sweeping up glass and helping put shops back in order. Follow http://twitter.com/Riotcleanup get involved.
What else can 'we' do? Collectively and individually. There's so much negativity, and even talk of people wanting to shut down social media, so it should (without wanting to sound like a hippie) be used as a force for good.
For instance, do the police need help monitoring social networks or manning phones? Do Fire stations need extra food and water? Do displaced people need clothes and stuff? Is there anything people need to help cover up broken windows? Or do we go further and encourage people to go out in the streets, en mass, and create a peaceful but overwhelming human shield?
And, on a music-note, with record labels, who've lost their stock (see here: http://drownedinsound.com/community/boards/music/4299987 ) what can we do to help them out? This could potentially bankrupt some small labels and shops, although I'm sure insurance will help but might take longer than some labels have.
WHAT CAN WE DO?