I would immediately ban plastic bags from fruit and veg aisles, plastic packaging for newspaper supplements and magazines, free 'gifts' on magazines and with kids meals, etc - it all just ends up in landfill.
I would also ban all leafleting and paper advertisements that come with newspapers and magazines. Does anyone ever look at them? I just chuck it all straight in the paper recycling.
I would ban private jets, private trains, stinking great cruise ships, and any vehicle that doesn't have a particulate air filter.
I would ban SUVs - fucking horrible things blocking up all the roads and hogging more than their car parking space so if you drive a normal sized car you can barely get in/out of it with one next to you.
I would mandate all cities and towns to install cycle paths and cycle/pedestrian friendly areas, car-free centres, basically make it really hard to drive and much easier to go by foot/bike unless you have a disabled sticker.
I would ban business travel for meetings and insist that all meetings take place via video conferencing. The vast majority of business travel, as far as I can see, is a total waste of time and resources.
I would give everyone a limit of two return flights per year and only one of them can be long-haul.