Online Coupons | Cash Back - FatWallet.com will send you an email of all the deals its members find.
I used a deal for a great Sams Club membership. Sign up at Sams and you get $25.00 back on a gift card to use for a first purchase. So my membership was $10.00 for the year
They have a tracfone code thread that will give you free minutes
I bought a phone with a 120 minute card and 3 month service for $30.00
After using the codes, I ended up with 500 minutes and 6 months service, at 5.6 cents a minute
link
Official Thread - Tracfone bonus codes
They also have some kind of cash back / rebates, but I haven't checked into it.