Shelf life of Food

So I have been researching the shelf life of food because its one of the problems of big shopping trips. I buy everything at the beginning of the month but will it all last?

Well I found the site, Stilltasty.com it has almost every food and its shelf life.

Some important ones are:

• An opened block of cheddar cheese is good for about 3-4 weeks in the fridge and 6 months in the freezer.
• Open Liquid Coffee Creamer is good for 2 weeks in fridge
• Opened or Unopened Milk (whole, skim, 2%, 1%) Refrigerated is good until 1 week after sell by date
• Chicken Breast & other pieces, if refridgerated, lasts 1-2 days but if its frozen will last for 9 months
• Table Salt keeps indefinitely