34 Only flush toilets if really needed; follow the Australian maxim: "If it's yellow that's mellow, if it's brown flush it down."
35 Improve the ambience and dine by candlelight, saving electricity.
36 Insulate your home. Cavity wall insulation can cut heat loss through the wall by up to 60%.
37 Buy from companies with eco-friendly policies; boycott those without.
38 Soak up the sun; even in Britain, solar panels can produce a surprising amount of energy.
39 Clean the back of your fridge. Dusty coils can increase energy consumption by 30%.
40 Avoid air travel; it produces three times more carbon dioxide per passenger than rail.
41 Pretend Christmas has come early; turkey is more likely than chicken to be produced in the UK, while British-grown brussel sprouts require less transport than Kenyan mangetout.
42 Grow plants to give to friends instead of cut flowers.
43 Choose a car with a 3-way catalytic converter, to reduce nitrogen oxides and hydrocarbons emissions by 90%.
44 Ban blinds. Heavy curtains keep in more heat in winter.
45 Change materials as well as rooms; MDF and chipboard release formaldehyde, a carcinogen. Buy sustainably produced wood instead.
46 Cut up the plastic rings from packs of beer; they are invisible in water so wildlife can choke on them or trap themselves.
47 Bring a mug to the office instead of using polystyrene cups.
48 Snap up a 36-exposure film instead of 24, reducing waste from packaging and processing.
49 Cancel that expensive gym membership and walk to work instead.
50 Buy less. Save time and money as well as the planet.