1. Bottled water
Tap water is safe to drink in most European and North American countries, yet people still insist on buying bottled water. If the bottle is labelled as being from volcanic springs - you can bet that it has probably been imported from some distance. Imagine the carbon footprint of the flight / shipping of the water! And that's before adding in the emissions due to making the bottle and / or recycling it.
2. Food and drink from far distances
When you go to the supermarket, look at the label to identify which country the food is from. There is no need to buy New Zealand apples in the UK in the autumn - but people do!
Think twice about buying a bottle of wine from the other side of the world - you may be able to find much more local wine, which will have travelled far fewer miles.
Better still try growing your own fruit and vegetables in your own garden. Planting an apple tree will not only provide you with lots of fruit, with zero carbon footprint, but the tree itself with breathe in carbon dioxide from the atmosphere - making these fruit effectively carbon negative!
3. Meat eating
Reduce your consumption of meat, especially red meat.
4. Clothes from far off lands
Check the clothes labels before you buy. If they come from more than 1000 miles away, keep looking!
5. High packaged items
Avoid goods and services that have unnecessary packaging!

While you are using the computer, you might just think that the screen is just too bright. You can just turn the contrast more so that your computer screen becomes darker and if saves a bit of money at least you do not waste all the extra energy and you will not damage your eyes.

If you are a person who likes to go to the gym just to train your running skills, you should not. You should just go out for a long jog in the park or just jog near your house as when you are tired from all the running, you can just go home and take a break.

Fit energy saving bulbs
Install thermostatic valves on your radiators
Insulate your hot water tank, your loft and your walls
35% of heat generated in the house is lost through the walls. Installing cavity wall installation to a medium size house could reduce your heating bills by up to £100 per year
By installing 180mm thick loft insulation you could stop about 25% of your heating escaping through the roof
Recycle your grey water
Replace your old fridge / freezer (if it is over 15 years old), with a new one with energy efficiency rating of "A"
Replace your old boiler with a new energy efficient condensing boiler

Sign up to a green energy supplier, who will supply electricity from renewable sources (e.g. wind and hydroelectric power) - this will reduce your carbon footprint contribution from electricity to zero
Turn it off when not in use (lights, television, DVD player, Hi Fi, computer etc. etc. ...)
Turn down the central heating slightly (try just 1 to 2 degrees C)
Turn down the water heating setting (just 2 degrees will make a significant saving)
Check the central heating timer setting - remember there is no point heating the house after you have left for work
Fill your dish washer and washing machine with a full load - this will save you water, electricity, and washing powder
Fill the kettle with only as much water as you need
Unplug your mobile phone as soon as it has finished charging
Defrost your fridge/freezer regularly
Do your weekly shopping in a single trip
Hang out the washing to dry rather than tumble drying it
Go for a run rather than drive to the gym