Not bad ideas though no way in hell would I involve myself in black friday sales...I don't really want to get trampled or have a mental shutdown due to being overwhelmed by all the chaos, but looking for stuff on sale in general or getting stuff if they have a sale going on isn't a bad idea...but not if its like a crazy rush like black friday.

I have on occasion gotten free things from sites of that nature, but its not consistent by any means but could be useful. Problem with socks though is somehow they end up getting lost so even buying a years supply I'd still have to buy more when I lose half of those, but I do generally look for stuff like that on sale....and have gotten a lot of clothes from thrift stores not so much socks and underwear though.

May have to look into the other things you mentioned.