Where can I find good boxes to pack things in?
Well I get all my boxes from my local grocery store for free. They are always willing to give them to me because they are just going to throw them out anyway.
The best place I've found is a U-Haul rental place. They sell sturdy boxes & tape. A moving company would also have boxes, as would a FedEx or UPS store.
Liquor stores usually give out lots of them.