I have a document in word. I list them by company then underneath I put the FO's in alphabetic order. Then when I tested a scent I write next to it what I thought. If I didn't like the scent I write next to it don't buy again. The hardest part for me is when I sell a scent I sometimes forget to write next to the FO that I sold it. So, maybe someone on the board is ISO a FO I think I still have that scent but really I don't because I sold it....LOL:) Other than that this document has really helped me to keep tract of all the FO's I have.