If a piece of chicken will last 3 days before freezing, it'll still last 3 days after thawing.
I wouldn't freeze veggies. It'll do bad things to the texture of most of them. Store bought frozen veg are 'crash frozen' so that the ice doesn't form crystals large enough to rupture the cell walls and ruin (much) the texture.
Learning how to prep food for quick cooking is preferable to freezing. You get to eat it fresh (freezing affects the texture of everything to some extent) and you don't have to do the defrosting dance.
Toaster oven is preferable to microwave for reheating most things imo.