Re compost, we have had a bin for 3 years and have never used the compost, but putting our scraps in there has halved the amount of rubbish in our general waste bin.
Re freezing, my mum once produced a packet of coles iced donuts marked down to a $1 from her freezer. I frreze bread but stale supermarket donuts is a bit far. Then she told me she only bought one packet as she wanted other shoppers to also reap the benefits of heavily discounted supermarket baked goods.
She also sends me lengthy letter typed on a 1960s typewriter, doesn't wrap gifts and has stuffed bears on her sofa to the extent there is no room to sit.
Also, no matter what we are cooking, my mil always brings a packet of white bread rolls from the local bakery when they come for a meal.