There’s a blog called Fiddledeedee that seems to be the guru on the Publix deals and matching coupons with those each week. In TN, our deals run from Wednesday to Tuesday, though in Florida I think it goes from Thursday to Wednesday, so make sure to verify what the sale week is for your area.
Also, Publix offers a Penny Item (sorry, not in FL) every Sunday and Monday: Usually this will be prominently displayed by the cash registers and for every $10 in groceries you spend (pre-coupon total), you get one of the items for a penny! This past week it was Publix Tortilla chips, last week it was cookies and the week before it was Greenwise Toilet Paper! You can even break your shopping cart into $10 increments so you can stock up (like on the toilet paper). It takes a little more time, but the savings sure are worth it!