Do you know what country your ancestors were from? If so, you should check out the SIG (Special Interest Group) mailing lists. These are online discussion groups for researchers to ask questions and to receive news from the JewishGen volunteers about new resources that are coming online at the website.
I subscribe to only four SIG mailing lists:
Gesher Galicia SIG (Galicia, where the Levites/Lewites/Levitt family was from)
H-SIG (Hungary, where the Handlers and Hollanders were from)
Romania SIG (Romania, where the Goldstein (possibly Yancowitz) family was from)
Ukraine SIG (Ukraine, where the Segal family was from)
You can even search archived messages within each SIG for surnames and other topical information.
The mailing list subscription page looks like this for me:
However, there are 31 possible SIGs to subscribe to ranging from DNA to rabbinic genealogy to Early American.
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Take advantage of all that JewishGen has to offer, and if you are able, consider making a donation to this non-profit organization, not only because it's doing great work, but a donation of at least $100 gives you greater flexibility in searching their databases.