1)Start buying stuff (that includes putting things on layaway) that you want/need now. Prices will skyrocket and availability will become scarce. This does not apply to things like optics and weapon lights though
2)Start buying ammo but don’t panic buy
3)Keep training, competing, and shooting. Shooting is a perishable skill and if you aren’t working to keep it sharp; then your skills aren’t going to there to help you out when you need them the most.