Get to an everyday activity in a smarter way at least once during the week.
Go to some place you usually go to, like work, school, spare time activity or your grocer in a climate smarter way than usual. This means mostly by bike or by foot, but if you tend to go mostly by car, public transport counts too.
Transportation gives rise to roughly one quarter of all green house gas emissions. [https://www.epa.gov/ghgemissions/sources-greenhouse-gas-emissions].