When purchasing new appliances, choose more efficient appliances over less efficient one's. Replace all your incandescent lightbulbs with LEDs. Limit your use of air conditioning to reasonable temperatures. Choose energy-saving programs for your washing machine and hang your clothes outside to dry when it's warm instead of using a dryer.

Stop driving unnecessarily. If there is decent enough public transit, use it instead of a car even if it takes longer. If the distances are short, use a bicycle. Choose food that causes fewer carbon emissions - locally grown vegetables are the best in that regard.

On its own none of these matter. Combined however they will significantly reduce your emissions. None of these cause significant sacrifices.

Not only should we ban plastic straws, we should continuously ban more and more plastic. First plastic straws, then plastic bags, then plastic packaging. The systematic change will happen either gradually or spontaneously. I prefer the latter but if the former is all we have it must be encouraged as much as possible.