There are SEVERAL things I have done without, but I did have one item that I absolutely couldn't do without. I ran out of concealer at the wrong time... when I couldn't afford to but more of the one I was using. It was up over $20. I don't sleep very much these days and I need all the help I can get to not look like a zombie. So, while at Target one day I got the Garnier Skin Renew Anti Dark Circle Roller (I added the link if you wanna click to read more about it). I was already using their Skin Renew Anti-Puff Eye Roller; but this was the same with WITH concealer in it! They seriously last forever. You use so little each time that it really extends the life of the product. It runs around $7-$9 depending on if you get it at Target or Wal-Mart or your drug store.
My recommendation: When using it, apply under your eye after applying your moisturizer. Let the concealer dry completely, it will lighten up a little more and soak in. The product comes in Light/Medium; no matter what your skin tone (lighter then "dark") if you let it totally dry and then apply your foundation or powder you will get a good result and will blend just fine.
It's got a cooling factor to it too, which helps with the puffiness.