So many site systems!
Here is another little trick that I recently became aware that many folks don't know. If you run a Configuration Manager/ConfigMgr/SCCM system of decent size you probably have many servers performing variable ConfigMgr roles in your environment. Then one day you get asked about some role, like distribution points, and you have to remember which servers have those roles. The UI has an easy way to show only the DPs, or any other site system role. Rather than trying to describe it, I'm going to let these pictures replace my thousand words: