Get sufficient sleep in a well-ventilated room. Stop Smoking Practise stress management and relaxation. Allow time for leisure pursuits. Only take medicinal drugs such as antibiotics when absolutely necessary. Avoid recreational drugs, which may suppress immune function. Use immune-boosting herbs such as echinacea and astragalus at first sign of symptoms (don't take these continuously, though, as they'll lose their effectiveness).

Decrease intake of junk and processed foods and increase intake of fresh fruit and vegetables and wholegrains for lots of immune boosting nutrients.

Cut down on tea, coffee and alcohol. Replace them with lots of good quality water, fruit juices and herbal teas.

Take regular exercise to stimulate circulation.

Use nutrients such as selenium, vitamins A, C and E (antioxidant and protect against damage from free radicals), zinc and magnesium (protect against colds).