Screensets are a good way to economize your windows and workflow. If you have only a single monitor they will be of particular use, since there are way too many useful windows to reasonably keep on the screen at any time. But even multi-monitor setups can benefit from screensets. I'll go over window screensets which I think are the most immediately useful, but there are track view and selection sets as well that you can look into.
Ok, so here is a basic setup, the arrange window and mixer. Let's save it as the first screenset.
Next is a sort of track inspector screenset. Only a single mixer channel is shown at a time, the one that is currently selected. To give more arrange space you can hide the master track. This will be the second screenset.
Last we'll create a screenset with the track list and project media bay. Save as the third screenset.
Now because the first 3 screensets have default key mappings of F7/F8/F9 (can be changed from action list), let's switch between them. Pretty sweet. People working on a laptop or single PC screen will find immense use from screensets.
Of note on the screenset page is auto-save when switching screensets. Enabling this will automatically save changes to your current screenset when switching, but you can potentially screw up a screenset.