Well, that's the trick, isn't it? You have to give people a way to reduce government's power if the government does something the people don't like, but do it in a way that keeps society from flying apart.
The best solution i can think of is constantly seeking to reduce the government and limit it's power, size and responsibilities, always trimming the hedge. I.E. conservatism. Any government fundementally should be trusted and relied upon as little as possible, if you want to prevent abuses.