e-comms, e-records (data security!), reusable shopping bags, buy local, less packaging, turn off lights, adjust temperature settings re heat/cooling
Some organisation
LED lighting, avoid packaging as much as possible, and set up recycling eg paper /plastics/ foils; use e-waste and recycling depots
More commitment
Public transport/walk/ride a bicycle as possible (even 1–2 days/week to work – with a friend/colleague?), switch to renewable energy (add solar panels – work/home), car share commutes