Weather-seal doors and windows to prevent heat loss in winter Insulate ceiling/floor (if raised) to retain winter warmth and repel summer heat Shade west-facing windows with blinds or plantings Change to energy-efficient lighting Install energy-efficient devices, such as a ceiling fan to circulate air and exhaust fan with damper to prevent winter-warmth loss Install solar-boosted hot water service or (if the budget allows) a solar photovoltaic system Replace openings with double glazing or, more economically, hang heavy drapes to keep heat in Install water-saving devices or at least fix leaky taps Install a rainwater tank Plant a low-water or drought-tolerant garden (Source: Domain, The Age - 1 August 2014)