I am feeling very privileged to live in a direct democracy, the country is very small and is called Switzerland. We do have 2 instruments to keep our Politicians behaving and represent the people:
1) Referendum: if we don't like what our policy makers have enacted, we can collect 50'000 signatures and the people have to vote on it
2) Initiative: Our policy makers don't want to take care of a certain topic? we, the poeple will vote on it after collecting 100'000 signatures.
It's not a perfect system and it might not work in larger countries on national level, because it is a somewhat slow process to find consensus. However, only the thought alone that politicians' decisions could be overthrown by the people helps keeping them thinking twice what to support and do.
Best
-S