As the resident treehugger, my list is a mile long, so I'll just give you a taste:
- save extra salt, pepper, ketchup, hot sauce, etc... packs, napkins, wet-naps, plastic utensils left over from fast food runs in preps
- Reusable shopping bags to bring in dinner from the store and garden. There a $1 if you get the cheap cloth ones, so I've taken using them as gift bags as well (at least for my dirty-hippy, liberal friends who appreciate the less fine things in life), instead of a $5 paper bag that gets thrown away. I've even used a paper grocery bag to make a card: neatly tear a rectangular piece of paper bag, fold in half, puncture a small hole in the corner next to the fold with your pocket knife and use the grocery bag handle to tie th card onto your gift bag through the hole in the card and put the rest of the bag in your compost or keep it to place your cooked bacon on-- soaks up the grease (God, I'm such a fucking hippy!)
- clear, plastic containers from salad, fruit, etc... for starting seedlings (closing the lid makes it a little greenhouse)
- ripped jeans or canvas pants for patching other clothing, reinforcing knees of pants by adding a layer, making roll-up cases for tools like punches, wrenches, screwdrivers, spare mags and cleaning kit, etc... by sewing small rectangular pieces to large rectangular piece for pockets and two long, skinny pieces sewed to the backside at one end to tie the role closed. Note: if you're really crafty, you can make paper from shredded jeans
- coffee containers (metal or plastic) to store brass for reloading, hardware fasteners, misc...
- pop cans for TG's stoves and to make solar water heaters (have the cans, but haven't tried the heater yet)
- end pieces of wire fence to make garden staples, crimp the end of soaker hoses and poly tube in your garden, etc...
- Old doors as fold up work benches. You screw the hinges to the wall and hang the leading edge of the door with chains (this is my favorite of TG's brilliant innovations, I'll see if he will post a picture)
So cool, guys! Reduce, Recycle, Reuse, Reload (we like to roll our Rs in Nuevo Mexico)