Quickly and cheaply. People who only do development tend to look at every problem as some code they need to write.
We saved multiple customers a lot of time and money by just doing minor load balancer or web server configurations, rather than letting their developers doing a custom application to handle things like proxying or URL rewrites. Similarly we also frequently have to ask customers why they aren't offloading work to their databases and let it do sorting, selection, aggregation or search.
Having just a small amount of knowledge about what your existing tools can actually do for you, and knowing how to "Lego" them together solve a large number of everyday problems.