I suppose the most frequently asked questions are regarding contacting others in the same lineage.
That can often be answered by visiting the HAM Country Y-DNA "Families" page at:

 http://ham-country.com/HamCountry/HAM_DNA_Project/HAM_DNA_Families.html

Most other questions are usually with regard to specific DNA tests, and the FAQ page at FTDNA or FTDNA support can help with those.

Otherwise, this page is open for quick answers to frequent asked questions from the HAM DNA group's members.