I use a vacuum sealer, but I do wash and reuse the heavy bags. I buy it in rolls, and cut them long (every seal uses up about an inch). I individually freeze things (burger patties, chicken pieces, pork chops) and once they're well frozen, neatly bag, seal, and store in the deep freeze. I can pull out what I need for a meal and reseal the rest.
It's not perfect; sometimes the bag will get a pinhole and lose vacuum, or things will stick together, but it really keeps freezer burn away.