Find a favourite scent that you enjoy or reminds you of a pleasant memory. It could be a perfume, cup of hot chocolate, walk in the woods or a holiday scent. Sit comfortably, rest your eyes and take some full, steady nose breaths drawing in your chosen aroma for a couple of minutes. You can even carry this around with you, so you can benefit wherever you are.
Some relaxing essential oils you may find useful are woody scents like cedarwood or petitgrain. Geranium and rose oils are soothing, whilst lavender and chamomile oils can encourage sleep. Uplifting oils like lemon, orange and mint can relieve fatigue and nausea. Always follow the manufacturer instructions and never use neat on the skin.