What you can do:
1. Support the EFF, CDT and other orgs that work on technology and civil liberties.
2. For truly private data and activity get religion with PGP, TrueCrypt, Tor and other tools. For the non-private stuff, take some sensible measures (see below)
3. Consider sandboxing/compartmentalizing your online activity across disparate ids, browsers, machines, phones and locations. Definitely run Ad Blockers/Filters.
4. Stay current with EFF/CDT and related twitter feeds. There will be another privacy debate at a policy level. Get educated, push for the good guys.
Here's an overview resource: http://amzn.to/etLNze
Mark was given an award by the EFF a couple of years ago for his bravery.