My first reaction to seeing your comment here is, take a little break! Ask yourself what your “need” is. No worries, there are still other folks whittling down those Unknowns while you do something different and there will still be some to look at if/when you come back to it.
If it’s satisfying to see a pile get smaller as you id, then pick a different, more interesting pile. (Going to a still-broad category where you can help narrow down some things, like @fffffffff suggests, is a good strategy when I want a change of pace.)
If it’s satisfying to just be helping in a positive yet easy way, there’s a whole sphere of Annotations- you can pick something interesting yet relaxing to go through. Related to that (same pane in Identify), adding Observation Fields can be helpful too, and can be as complex or simple an operation as you want depending what you do with it.
My overarching message: Keep it fun, and if it does not feel fun or feels like just a job, switch up to something more fun.