Major respositories for accessing marriage records. It is also advisable that you check the Secretary of State (SOS) office for a particular state to see if they provide online access to marriage records for that state.
A playlist of marriage record tutorials provided by Ancestry.com's YouTube Channel. Click on a thumbnail (displayed at the bottom of the video player) to preview or play a specific tutorial. The videos will also play in sequence.
Good tutorials and tips for locating and analyzing marriage records.