Another trick is to get the air out of your freezer bags. I don't own one of those fancy seal-a-meal machines any longer so I use a plastic straw, close the freezer bag up to enough to allow the straw in at one end and suck out the remaining air and quickly pull out the straw and finish closing the bag. My freezer stuff lasts longer this way.
I also found out that when freezing veggies such as onions, peppers, etc. I chop them up to the size I like, place them on a cookie sheet and put them into the freezer for a couple hours. This dries them out so when you thaw them out later, they're not so watery. I place them in a freezer bag and they stay more individual instead of in a pile. In fact right now I have peppers and mushrooms on a cookie sheet I need to place into freezer bags right now. Guess I should get cracking and do that.