What was the last undigitized record you accessed?
Not everything is online.
Manuscript records can hold great clues–many which have been hiding for decades. It can be more difficult to access materials that have not been made available in digital format, but brick walls are sometimes “brick walls” because no one has gone beyond materials that are readily available.
There are many reasons for “brick walls,” but accessing as many materials as possible is one great way to reduced the number that you have.