To induce restful sleep, put a drop or two of lavender on a cotton ball and tuck it into the corner of your pillow case. Or perfume a room by adding a few drops of lavender to either a lamp-ring or aromatherapy lamp. You can even add a few drops of essential oils to the melted wax in a burning candle. If you are pleased with the results of the lavender, then experiment with some other oils, either alone, or in combination. Other good beginner oils are Orange or Mandarine, Geranium, Sandalwood, Rosemary, Cypress and Eucalyptus.
None are extremely expensive, and all are very useful.
Your nose is really your best guide to which oils will work best for you. Trust your nose, but educate yourself on the safe and effective uses of the oils you select.