Will internet surveillance affect your internet usage?

So by now everyone's heard of the NSA, and plenty of us have already been warned that if you post the wrong thing online it could affect your ability to get a job. New tech is coming out that analyzes a person's internet activity and applies that result to your credit score. Another new thing is a webcam tool that knows when your paying attention. Google came out and no surprise they admit that they can read your emails and they use your internet data to personalize advertisements. Who knows what's next but are you doing anything differently after hearing this, or even considering changing? Any advice for anyone who wants to have more privacy without disconnecting permanently?