The Central New York Genealogical Society (CNYGS) has been publishing their journal "Tree Talks" since their inception. This is a journal of mostly transcribed records of original documents from normally obscure or hard to locate records.
"Tree Talks" has been publishing these records arranged by county in each of their issues. CNYGS now is offering "County Packets" which will include all of the previously published materials arranged by the county of your choice. This is an excellent resource and will help to break down several brick walls for sure.
By purchasing only the specific county or counties of interest, you will be able to narrow your search time immensely. The other great news is that they are working on a project to make an on-line index available. Some of the counties that the indexes are available for on-line at this time are: Allegany, Chenango, Clinton, Erie, Franklin, Greene, Hamilton, Orleans and Wyoming. More county indexes should become available as the volunteer members submit them.
A description of their county packet program and price list is here:
Membership information for CNYGS is here: