Aside from what everyone else said…
IMHO, the key to social media is how you use it. If you just use it as a vehicle to post specials, you will be disappointed with the results. If you use it is a way to have a 2-way dialog with your customers, you will thrive from it (and when you DO post specials, they will be a lot more effective). Want a new specialty pizza? Ask FB fans for entries and name the pizza after the winner. Thinking about changing your hours, put it on FB. By engaging your customers, you create a sense of ownership among them - they feel like they’re part of something exclusive.
And a really great way for me to gain FB fans was to offer a prize to the xxxth fan AND (more importantly) to the person who referred the xxxth fan. For us, these contests have always generated 50-75 additional fans.
I do not think you should post more than 2 or 3 times a day. There are tools out there to schedule your posts if you wish. Also, be aware of when you post. Noone is looking at their feed at 2:00 in the morning and by the time all the morning posts come through, yours is at the bottom of the feed or worse. Try to post around 9:00 a.m., 4:00 p.m., or 8:00 p.m. That seems to be the times of peak activity.
It’s a great tool but you get out what you put in…
Good luck
Patrick Cuezze
patrick@nextdoorpizza.com