So my solution has been to buy several bags of onions, carrots, celery, and corn and then wash/dice/and vacuum seal them and then put them in our huge chest freezer. We have two big freezers so this makes more room in my fridge. Also it makes meal prep for soup or stew (which we have once a week) much simpler. I just dump the pre-measured frozen veggies in the crock pot or stew pot and add my liquids spices and meat and vuala! I'm done and can move on to other things.
Now I know many people here ask "why don't you can them up?" Well for those who don't follow my blog I just recently went through a pretty bad health event. The result being I didn't can anything this summer. I'm hoping to can up some applesauce this fall because my family rebelled when I tried to serve them store bought. Be warned that home canning your own foods can lead to your family becoming picky because the homemade stuff is so much better!