Buy up your firearms now, along with lots ammo for shooting and for barter material. We have four more years of Team Biden in charge, and I'm not sure we can stay civilized.
Junk Silver will likely be good, but don't rely on it too much. Have a stock of something you use that is unique to your own skill set, like seeds if you're good at that, fishing and hunting gear, mass off-grid cooking equipment if that's your bag, tools if you're good with them, whether it's tools for construction, or vehicle maintenance. If it is vehicle maintenance, stock up on petroleum products other than gasoline, filters, and parts for your own vehicles, at least, plus as much generic stuff as you can keep.
Don't buy a long shotgun and a lot of bird shot thinking you will teach yourself to hunt pheasant when the time comes.
Don't bother with land, unless it's way out in the Offgrid. Trump owns the land of Mar-a-Lago, but it's "his" for exactly as long as some small-time Trump-hating magistrate says it is. They won't even bother with paperwork if they want to invade your home.