If you're looking for a hotel go to TripAdvisor and select 'GreenLeaders' from the 'More' menu option above the search box.
Save and re-use the little sundries that come along with packaging, such as rubber bands, twist ties and boxes.
If you only need a tool or piece of equipment infrequently then instead of buying one, save resources by asking a friend or neighbour if you can borrow one. Or check online for a lending club, such as Streetbank.
Sprinkle dry tea leaves to deodorise problem areas such as your cat litter tray.
Grow houseplants for clean air and give them rainwater occasionally as it has less impurities than tapwater.
Choose rechargeable batteries and a battery charger to cut down on disposables. Eventually recyclable batteries reach the end of their life too but they can be recycled – local recycling policies vary so check with your recycling facility.