I work with darktable, but that is similar to lightroom in its workflow.
Since I work with both JPGs and RAWs, my workflow is a little more complex than working with RAW only. Ignore the steps with letters for a RAW-only workflow:
1. delete obviously shit pictures in camera
2. import pictures
3. rate each picture quickly (by setting JPG and RAWs to be grouped together in the view, both files are rated)
4. Filter to only view those you rated to be sufficiently good for spending time editing
4a. Filter to JPGs only
4b. apply one color marking to JPGs which are great as they are
4c. apply another color marking to JPGs which only need mild cropping
4d. apply third color marking to JPGs which aren't great as they are, i.e. where I want to use and edit the RAWs.
5. Ungroup the JPG+RAW view to see the individual files. Edit RAWs where marked as necessary (those marked in 4d.). Crop JPGs marked in 4c.
5a. Mark cropped JPGs and edited RAWs with a fourth color markign.
5b. Filter to view all those with fourth color marking and export them as final pictures.