*You can often get the buy one get one free vouchers online, so just bring a friend with you and whilst they buy one, you can get a free one.
*On Halloween and Valentine’s Day there are special coupons available which you can buy for only $1.00. You will get 12 coupons for which you can get free food afterwards.
*Go to McDonalds.com and sign up. They will often send you promotional offers and you can get free food.
*You may also apply for a job there, though even workers don’t get all the free food they want. Other option is to find somebody who works there and ask for them to put you some free food aside.

OR you can use social engineering