I have hundreds of plastic bags and I hate throwing them out! It's just a shame to do so! I learned this from my mother and I didn't see anyone with this specific type of fold.. so hopefully this will be useful.
Fold bag in half and then again till it looks like this!
OPTIONAL: Enlist help of your precious cat to help with getting the air out of the bag... LOL! Or any pet will do.. :D
Fold over one edge, starting at the bottom of the bag
Lift up, should now look like this. Keep flipping from side to side.
Keep flipping from side to side till you have a triangle with part of the handles out.
Tuck it into the open part of the bag and voila! Finished. These are quick to do as you get used to it.
They are easier to store and if you need to bring a bag with you anywhere for something then you can tuck them in your purse (even a pocket if you really needed to).
I don't know if you are like me but I hate buying a plastic bag at the store because I already have so many at any time but it's also the store's advertising/being cheap because they won't give you a bag for buying something anyhow...
Any questions on directions please let me know!