If saving the environment is not enough to get you to change your habits, then saving for yourself will. Paying for disposable bottles and bags and using more water and electricity than you need is also wasting your money, and nobody wants to do that.
By changing your habits, you can save for the future. Let's say for example that you did not buy bottled water, used fewer bags, saved energy and saved water every day, and managed to spend just $5 less each day. If you have 30 years to retirement and additionally put $5 more dollars each day into savings earning 10%, that would be over $325,000 more that you would have.
Look at your habits, look where you can save, and add it up. Search the web for a savings calculator to see how it could compound over time. Search for information on energy calculators and energy audits to get other ideas on how to save green.