I do provide embossing steps within this tutorial, but have some more specific information on the embossing process and materials in the other instructable.
I have made many of these balsam pine-filled sachets over the years to sell and to show off what our rubber stamps can do. The pine scent can last for years. (I had a housemate who used to stick her head into the boxes of balsam to inhale the smell - don't inhale too deeply!). Once your sachet is done, it can go into a drawer, closet or basket, but you may not want to hide it. You can set it out on display or attach a ribbon and hang it on a wall, knob, mantel, holiday tree, etc... Make a bunch as holiday stocking stuffers.
Of course, you can fill the sachets with whatever kind of filling you would like: lavender or dried potpourri. (I would avoid potpourris that have a lot of fragrance oil on them, as the oil may seep through the velvet and cause spotting/stains.)