Things do pop up from time to time, but here are some things that have worked for me:
~SmartPhone Apps - McDonalds has been doing a free Egg McMuffin if the local NHL and/or NBA team is leading after the first period/quarter. Also take advantage of Starbucks deals through their app from time to time.
~Loyalty Programs - Panera recently gave me a $3 off any online order through their loyalty program - a free 12oz honey walnut cream cheese? Don't mind if I do.
~Random free deals - I keep an eye on a few deal blogs through an RSS feed reader and check out Hunt4Freebies.com from time to time - I've found a number of restaurant freebies from those source, including: a free egg roll @ Panda Express, free burrito @ Chipotle, free meal @ ShopHouseKitchen, etc.
~Happy Hour - Take advantage of specials if you are going out. At my local watering hole a draft beer and a large basket of amazing french fries run you $5.75 + tax/tip during happy hour. Not a bad night out (although, to be totally honest, I usually have two beers).