In my experience it mostly just boils down to having the right processes and being strongly motivated to do things right rather than push things out the door as quickly as possible. Assuming superiors have your back, this is doable. It's when they don't or when the developers lose or completely lack motivation that things start to fall apart.

Lack of motivation often means lack of process, lack of process often means lack of testing and maintenance, lack of testing and maintenance often means lack of quality. It's a vicious cycle too - once you start down the road it's harder and harder to get motivated about your product again.