By voting for all issues directly, like it's done here in switzerland.
Other systems where you vote people into office to do the actual decision making for you can hardly be called democracies in comparison.
In many US states, they allow ballot measures, but they are often worse than the options that would come out of the legislature because of the free for all nature of advertising for them and the general public's lack of knowledge of the details of the proposal. They do, however, allow issues such as gay marriage/pot to come up if it's too controversial for the legislature.