Increasingly, companies are hearing that the efficient handling of log files is a problem. The amount of data, the log frequency, the multitude of documented and undocumented formats, and the combination with traces and metrics from the monitoring may hardly allow for a different conclusion. Although there are specialized solution providers, they often operate proprietarily and/or with costs that are not sustainable for SMEs. In this presentation, case studies are used to show which solution variants can be used to reduce the time it can use to find errors using logs. The spectrum ranges from existing open source solutions to novel tools from research.