Things to Consider

Geographic locationIt's best for the venue to be central and close to the geographic area of both families, to make it easier for guests to arrive.
Reviews & opinionsRead reviews carefully, and learn to tell a genuine opinion from a comment written in bad faith or a fake review.
Business licensingMake sure all documents exist: a business license, a rental contract, third-party insurance, police and fire approval, a kashrut certificate and a Ministry of Health license for the caterer.
First meetingSchedule a visit to your preferred venues. First impressions matter and will influence the decision.
Price per plateCalculate the final price per plate only after adding all the extras, such as sound and lighting.
ContractMake sure there's a signed addendum documenting all verbal agreements with the sales staff, including any complimentary additions.
TastingsTaste several dishes before you lock in your final menu choice.
ParkingMake sure there's enough convenient parking for your guests.

Things to consider