I don't own a car (mostly because it's slower than the train). I use a carsharing service on the extremely rare occasion I need a car to get somewhere. Otherwise I either ride a bike or take the train. I mostly work from home (Yeah, I know not everyone has that privilege) I don't really eat beef or pork (mostly poultry and tuna for the protein, and tons of rice - I do bodybuilding) I don't order many things through marketplacess like Amazon (mostly because I'm fairly minimalist and don't like clutter. I also like things of good build quality that last longer) I take five mins. max. showers (I hate spending time in the shower) I don't buy new tech every year (I don't see the need to, if it works it works. My phone is three years old at this point and I plan on keeping it for at least three more years). I dislike fast fashion (again, mostly because I like things of high build quality). I buy food in little quanitites that I know I will eat and won't go to waste. I also avoid things that are packaged in tons of plastic. And I use my own shopping bags to carry groceries. I vote for politicians that try to tackle climate change in various ways
All of these are not necessarily active decisions I take because of climate change. They're mostly byproducts of my fairly simple and privileged lifestyle. I understand that not everyone has the privilege of a higher education with a good paying job that allows them to work from home, live in a city where everything is 5 minutes away on foot and buy stuff expensive products of high build quality that last longer thus avoiding fast fashion and other more climate damaging things.