Jim Neumann, for the DEVONtechnologies blog:

Drag this folder to the Favorites section of DEVONthink’s sidebar. This will give you quick access to the group.

The post at the link talks about how to use DEVONthink as a “read it later” service, but that’s not what caught my eye. I had no idea you could add folders to the Favorites section of the sidebar. You can do it by either dragging a folder onto the word “Favorites” in the sidebar (I couldn’t drag it directly to the spot I wanted among my favorites – it went to the bottom automatically), or by right-clicking on a folder/group, and choosing “Add to Favorites.” I still learn something new about DEVONthink almost every week, and I’ve been using the program for several years now.